Systematic error, random error, and human error are the three main types of mistake in physical and chemical laboratory research. Prior to taking any further action, these lab error sources should be thoroughly investigated.
Assuming you are using a stopwatch to determine the amount of time required for 10 pendulum oscillations, an example of how to tell systemic from random errors is to assume that you are. Your response time can be a factor when starting and stopping the watch. During one measurement, you might begin early and end late; on the following one, those inaccuracies can be corrected. Since all situations have an equal likelihood, these mistakes are unintentional. Repeated tests result in a series of slightly varying times. They fluctuate randomly around an average value.
If there is a systemic error, for instance, your stop watch won't start at zero, then the calculations will be different regarding the displaced value rather than the average value.
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Chemical bonds form because they are energetically favorable. Which description states what happens when a bond between two atoms is broken?
A.
The atoms absorb energy.
B.
Energy flows to the surroundings.
C.
The atoms become more stable.
D.
The atoms lose mass.
According to the research, the correct answer is Option A. The statement "The atoms absorb energy" describes what happens when a bond between two atoms is broken.
What are Chemical bonds?It is the union established by two component atoms of the same compound.
In this sense, they are constituted from the attraction that is registered between opposite charges, in a process that aims at the search for stability, these can be broken, reconstituted or experience both processes, either to absorb or release energy.
Therefore, we can conclude that according to the research, the chemical bonds between atoms are broken and new bonds are formed, this is because when bonds are broken and formed, energy is absorbed and released respectively.
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What will be the product when a sulfuric acid reacted with a sodium hydroxide?
The reaction between sodium hydroxide and sulphuric acid, with the chemical formula NaOH + H2SO4, produces sodium sulfate and water (NaSO4 + H2O).
This acid-base reaction results in the production of salt and water. here in this particular reaction sodium sulfate is salt (product of the neutralisation reaction).
• Caustic soda is an inorganic strong base also referred to as sodium hydroxide, with chemical formula NaOH.
• Sulfuric acid, which is a more potent acid, with the chemical formula H2SO4 as opposed to sodium hydroxide's NaOH.
The interaction of H2SO4 and NaOH results in an acid-base reaction. Sulfuric acid and sodium hydroxide, both acid and base mix to form sodium sulphate; NaSO4, a salt, as well as water as byproducts. This reaction serves as an example of neutralisation reaction.
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sean wants to investigate the effect of temperature on the rate of a chemical reaction. what type of variable is the temperature in sean's experiment?
Explanatory type of variable is the temperature in sean's experiment.
What is a chemical reaction?
Chemical reaction is the process by which one or more compounds, known as reactants, change into one or more new ones, known as products. Chemical components or compounds make up substances. To produce various compounds as products, a chemical reaction rearranges the atoms that make up the reactants.
As an illustration, when breathing, oxygen is inhaled, which causes glucose to react with it to create carbon dioxide, water, and energy.
Therefore, Explanatory type of variable is the temperature in sean's experiment.
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draw the sulfur‑containing product of the oxidation reaction between two 2‑methyl‑1‑propanethiol molecules.
The oxidation reaction between two 2-methyl-1-propanethiol molecules would produce a sulfur-containing compound called 2-methyl-1-propanethiol sulfoxide
H3C-S(=O)-CH3
In this structure, the sulfur atom is bonded to an oxygen atom, forming a sulfoxide group. The sulfoxide group is attached to the rest of the molecule, which is a 2-methyl-1-propanethiol molecule. The sulfur atom in this molecule is also bonded to two hydrogen atoms, as well as one carbon atom, which is part of a two-carbon chain. The carbon atom at the end of the chain is bonded to three hydrogen atoms, giving the molecule the formula C4H10S.The oxidation reaction between two 2-methyl-1-propanethiol molecules is an example of a chemical reaction that involves the transfer of electrons from one molecule to another. In this case, the sulfur atom in the 2-methyl-1-propanethiol molecule is oxidized, meaning that it loses electrons, and the oxygen atom in the reaction is reduced, meaning that it gains electrons. This results in the formation of the sulfur-containing compound 2-methyl-1-propanethiol sulfoxide.
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2 na (s) 2 h2o (l) -------> 2 naoh (aq) h2(g) the hydrogen gas is collected over water at 25oc. the volume of gas is 246 ml measured at 1 atm. calculate the number of grams of na used in the reaction. (vapor pressure of water
The number of grams of Na used in the reaction is 0.414 g.
What is vapour pressure?
The tendency of a substance to transform into a gaseous or vapour state is measured by vapour pressure, which increases with temperature.
Given data:
Volume of gas, V = 246 mL = 0.246 L
Temperature, T = 25 degree C =298 K
Total pressure, PT = 1.0 atm
Pressure of water = 0.0313 atm
The vapor pressure of gas, P = PT- vapor pressure of water
=1.0 atm - 0.0313 atm
= 0.9687 atm
∴ Number of moles of gas,
n = PV / RT
= (0.9687 atm) (0.246 L) / (0.082 Latm/mol.K) (298K)
=0.238/
= 0.009 mol
According to the stoichiometric equation twomoles of Na(s) are required to produce one mole of hydrogengas
∴ Number of moles of Na(s) is required
= moles of gas * 2
= 0.009 mol *2
= 0.018 mol
Mass of Na(s) required
= moles * atomic mass ofNa
= 0.018 mol *23 g/mol
= 0.414 g
Therefore, the number of grams of Na used in the reaction is 0.414 g.
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What are the chemical symbols for the elements: gold, silver, and tin respectively?.
Write the electron configuration for a neutral atom of selenium!
The electronic configuration of neutral atom of selenium is
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4.
Chemical element selenium has the symbol Se and its atomic number is 34. It comes in the category of non-metals. Selenium consists of 34 electrons distribution in its 4 orbits. Valence electrons are the electrons which are located in the outermost shell of the atom or molecule. Selenium has 6 electrons in its outermost shell
So electronic configuration of selenium define as:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4.
The neutral atom in selenium is Ar. so, The electronic configuration of Argon is represented as ,
1s2 2s2 2p6 3s2 3p6
The number of valence electrons is defined as the number of electrons present in the outermost shell of the atom. So, in the case of selenium, there are 6 valence electrons. so, like this we can write the electronic configuration of selenium.
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What are 6 required elements of a supplier label?
The 6 required elements of a supplier label are product identifier, supplier identifier , the signal word, the hazard statement, pictograms and the precautionary statement.
The supplier label must requires the 6 elements that is product identifier that is the name of the product and the ingredients of the product., supplier identifier that the information about the supplier such as supplier name and company , the signal word, the hazard statement this helps to use the chemical or while transferring the chemical, pictograms and the precautionary statement.
Thus, product identifier, supplier identifier , the signal word, the hazard statement, pictograms and the precautionary statement required for the supplier label.
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in calorimetry experiments we are able to determine the amount of heat exchanged in a chemical reaction or process by measuring the amount of heat lost or gained in the surroundings. t or f
In a calorimeter, when an exothermic reaction takes place in solution, the heat generated by the reaction is absorbed by the solution, raising its temperature.
How much heat is transferred in a chemical process, according to a calorimeter? A calorimeter is a tool used to quantify the heat generated during a chemical or physical process.For instance, the heat generated by an exothermic process in solution in a calorimeter is absorbed by the solution, raising the solution's temperature.The practice of measuring how much heat is produced or absorbed during a chemical reaction is known as calorimetry.It is possible to establish whether a reaction is endothermic (retains heat) or exothermic (releases heat) by monitoring the change in temperature (absorbs heat).The calorimeter's capacity to absorb heat, qcal, can be calculated from the volume of water inside and the temperature change that the water experiences. Divide qcal by the temperature change to get Ccal, the calorimeter's heat capacity.To learn more about calorimeter refer
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A sample of xe takes 75 seconds to effuse out of a container. An unknown gas takes 83 seconds to effuse out of the identical container under identical conditions.
Nicotine has molar mass nearly equal to 160.90 g/ mol
The two gas required different times to be diffused from the same container. Thus, the rate of diffusion has been proportional to the molar mass of the substance.
Thus, the ratio of the rate of two samples can be given by:
[tex]\frac{Rate ofA}{Rate of B}[/tex] = [tex]\frac{Molar mass of A}{Molar mass of B}[/tex]
Rate can be defined as the amount diffuses per unit time. The equation in terms of time can be given as:
[tex]\frac{Time of B}{Time of A}[/tex] =[tex]\sqrt \frac{molar mass of B}{Molar mass of A}[/tex]
Let gas B be Xenon, having diffusion time 75 sec, and molar mass 131.3 g/mol
[tex]\frac{75}{83}[/tex] =[tex]\sqrt\frac{131.3}{molar mass of A} }[/tex]
molar mass of A = 160.90g / mol
Nicotine has molar mass nearly equal to 160.90 g/ mol
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when 0.58 g of an unknown non-electrolyte is dissolved in 50.0 g of benzene, the freezing point decreased to 5.14 degrees c from 5.5 degrees c. if the kfp of the solvent is 5.12 k/m, calculate the molar mass of the unknown solute.
The molar mass of an unknown non-electrolyte is 165g/mol.
What is molar mass?
The molar mass of a chemical compound is defined in chemistry as the mass of a sample of that compound divided by the amount of substance, which is the number of moles in that sample, measured in moles. The molar mass of a substance is a bulk, rather than a molecular, characteristic.
∆T = imK
∆T= 5.5 - 5.14 = 0.36 degrees
Van't Hoff factor for a non-electrolyte is 1; molality is moles of unknown per kilogram of solvent; and constant is 5.12
When we solve for 'm', we have...
m = ∆T/(i)(K) = 0.36/5.12 m = 0.0703 moles unknown/kg solvent
Since the solvent has a mass of 50 g that is = 0.050kg
0.0703 mol/kg x 0.050 kg = 0.00351moles
molar mass = 0.58g/0.00351 mol = 165 g/mol
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The molar mass of an unknown gas was measured by an effusion experiment. It was found that the unknown gas effused at a rate of 2.5 × 10−6 mol/hr, whereas nitrogen gas effused at a rate of 3.3 × 10−6 mol/hr. The molar mass of the gas is
A) 32 g/mol.
B) 37 g/mol.
C) 24 g/mol.
D) 16 g/mol.
E) 48 g/mol.
Ideal gas law is valid only for ideal gas not for vanderwaal gas. To solve such, we need to know the relation between rate of effusion and molar mass of gases. Therefore, the molar mass of unknown gas is 48 g/mol. The correct option is option E.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between rate of effusion of gases and their molar masses can be given as:
rate of effusion of unknown gas/rate of effusion of nitrogen gas=√molar mass of nitrogen /molar mass of particular gas
Substituting all the given values we get
2.5 × 10⁻⁶÷ 3.3 × 10⁻⁶=√28÷ molar mass of unknown gas
0.56=28g÷ molar mass of unknown gas
molar mass of unknown gas =48 g/mol
Therefore, the molar mass of unknown gas is 48 g/mol. The correct option is option E.
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what is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39,5 grams of water?
The mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water is 32.4%
Mass of the solute = 18.9 gggg
Mass of the solvent = 39.5 g
Mass of the solution = Mass of the solute + Mass of the solvent = 58.4 g
The mass percent of the solute in the solution:
Mass of solute×100/mass of solution = 32.4%
What is mass?
Mass is an intrinsic belongings of a frame. It changed into historically believed to be related to the quantity of remember in a physical frame, till the discovery of the atom and particle physics. It become discovered that one-of-a-kind atoms and exclusive simple debris, theoretically with the same amount of rely, have although specific loads. Mass in cutting-edge physics has more than one definitions which might be conceptually wonderful, but physically equal. Mass may be experimentally described as a degree of the body's inertia, meaning the resistance to acceleration (change of pace) when a net force is applied.To know more about mass, click the link given below:
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Which one of these sentences is appropriate for a formal lab report in CHM113 lab? O Three more trials were conducted and the data was recorded. O First, record the seven concentrations of the red dye which...... O The corvet was whipped with a soft tissue and then........ The error occurred because Tim spilled the solution. o We got a good yield.
O Three more trials were conducted and the data was recorded.
In chemistry, attention is the abundance of a constituent divided by the entire extent of a combination. several kinds of mathematical descriptions can be outstanding: mass awareness, molar awareness, range attention, and volume concentration.
The awareness of the solution tells you the way much solute has been dissolved within the solvent. as an example, in case you upload one teaspoon to 2 cups of water, the attention may be mentioned as 1 t salt per 2 c water. The vinegar label will file that the solution is 5% via weight acetic acid.
The concentration of a Solute. There are basic ways of reporting the concentration of a solute in a solvent, via reporting the mass of the solute in a given volume, or the variety of moles of solute in a given quantity.
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Students in chemistry lab have been given the assignment to identify an unknown compound using the flame test procedures. The compound they are testing is a white crystal that emits a greenish light when placed into the flame. The unknown compound most likely contains.
There is a high probability that the unknown compound that chemistry lab students are identifying through flame test procedures is zinc.
Elements with crystalline structureMetals that crystallize in one type of crystalline structure are beryllium, cadmium, cobalt, magnesium, titanium, zinc, and zirconium.
Zinc element characteristicsAmong these metals, zinc is the only bluish-white one that burns in air with a bluish-green flame.
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what is the hydrogen ion concentration of a glass of orange jucice, with a pH of 2.8?
Answer:
0.001585 Mol/dm³
Explanation:
Hydrogen ion concentration = 10^(-pH)
10^(-2.8) = 1.5849 × 10^(-3)
What can be said about the concentrations of reactants relative to the concentrations of products at equilibrium? A) [Reactants] = [Products) B) [Reactants] > [Products] C) [Reactants) < [Products) D) (Reactants]/[Products] = Constant
At the state of equilibrium, the concentrations of reactants relative to the concentrations of products will be A) [Reactants] = [Products].
In the field of chemistry, equilibrium can be described as a state during which the amount of reactants is equal to the amount of product that is being produced from the reaction.
In other words, there are equal moles of the reactants as well as equal moles of the products at the stage of equilibrium for a reaction.
When writing the state of equilibrium in a reaction, we will represent this stage as [Reactants] = [Products]. After this stage, more of the reactants will be utilized for the formation of products.
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Does bromine react with fluorine?
24.00 ml of a 0.25 m naoh solution is titrated with 0.10m hcl. what is the ph of the solution after 24.00 ml of the hcl has been added? 13.40 13.17 11.56 12.88 7.00
The ph of the solution after 24.00 ml of the hcl has been added is 2.59.
Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.
Calculation:-
C₁ = 0.25 M naoh
V₁ = 24 ml = 0.024 L
C₂ = 0.10 M
V₂ = 24.00 ml
concentration of acid concentration of base
concentration = N₁V₁ N₂V₂
= 0.024 L × 0.25 M = 0.10 × 0.024 L
= 6 × 10⁻³ N = 2.4 × 10⁻³ N
Net concentration = 6 × 10⁻³ - 2.4 × 10⁻³
= 2.6 10⁻³
pH = - log [ 2.6 10⁻³ ]
= 3 - log2.6
= 3 - 0.41
= 2.59
The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.
The Concentration of an answer is a measure of the quantity of solute that has been dissolved in a given amount of solvent or answer. A concentrated answer is one that has a rather huge quantity of dissolved solute.
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a compound is found to have an empirical formula of ch2o. what is the molecular formula when the molecular weight is 180.0 grams?
Answer:
[tex]C_{6}[/tex][tex]H_{12} O_{6}[/tex]
Explanation:
the molecular weight of the empirical formula:
12+2+16=30
to find ratio of molecular:
180/20=6
multiply the number of atoms of each element by 6 to get [tex]C_{6}[/tex][tex]H_{12} O_{6}[/tex]
calculate the ph of a solution in which one normal adult dose of aspirin (670 mg ) is dissolved in 6.0 ounces of water
One aspirin at an adult dosage has a pH of 2.6 when dissolved in a solution.
What is the pH equation?Equation pH = log [H⁺] describes pH, where [H⁺] stands for the molar hydrogen ion concentration. It is important to note that in order to calculate pH, we must use the common (base 10) logarithm of the hydrogen ion concentration.
Given,
Mass of aspirin = 670 mg = 0.670 g
Volume of water = 6 ounces
= 6 × 0.0295735 L
= 0.177441 L
Molar mass of aspirin = 180.16 g/mol
Moles of aspirin = mass/molar mass
= 0.00371 mol
The pH of the solution is as follows,
The concentration of aspirin = moles of Aspirin/volume of water
Concentration of aspirin = 0.00371 / 0.177441
Concentration of aspirin = 0.020 M
Given that
pKa of Aspirin = 3.5pKa = -logKa
Therefore, Ka = 3.162 × 10⁻⁴
From the Ice table
3.162 × 10⁻⁴ = [x + H⁺]/[aspirin]
= [x²]/[0.020 - x]
Given that the value of Ka is small so we will ignore -x
x² = 3.162 × 10⁻⁴ × 0.020
x = 2.514 × 10⁻³
Therefore,[ H⁺ ] = 2.514 × 10⁻³
Given that
pH = - Log [ H⁺ ]
pH = - ( -3 + log 2.514 )
pH = 2.6
The pH of the solution in which one regular adult dose of aspirin is dissolved is therefore 2.6, as can be deduced.
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What information is not required on a workplace label?
The information is not required on a workplace label is the particular language border.
The workplace label not need to required the particular border of the language but the do need the following things that is the data of the product identification for the secure product handling. the workplace label is useful for the identification of the hazardous chemical that has been transferred the one of the container to the other container. the name of the chemical should be written as same as on the SDS.
Thus, the particular language border is the information is not require in the workplace label.
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A student adds 14.0 mL of water to 12.0 mL of alcohol. Which of the following is possible for the volume of the resulting solution?
A: 28.0 mL
B: 25.0 mL
C: 27.0 mL
D: 26.0 mL
The possible volume of the resulting solution if a student adds 14.0 mL of water to 12.0 mL of alcohol is 26.0mL (option D).
What is volume?Volume is a measure of the amount of space that matter occupies. Matter is defined as a physical substance that occupies space and has a mass.
In physical sciences like chemistry, the standard unit of volume is cubic metres (m³). From this, other units are derived including litre (L) and millilitre (mL).
According to this question, a student adds 14.0 mL of water to 12.0 mL of alcohol. These substances are both liquid meaning that the volume of the resulting solution will increase as follows:
12 + 14 = 26.0mL
Hence, option D is the correct answer.
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How many grams of KCl can be dissolved in 100g of water at 20 C?
The solution to the problem gives you the potassium chloride, KCl, solubility in water at 20°C, which is stated to be 34 g/100 g H2O. This indicates that at 20 °C.
34 g of dissolved salt will be present in a saturated potassium chloride solution for every 100 g of water. One or more solutes combined uniformly in a solvent form a solution. One typical example of a solution is adding sugar cubes to a cup of tea or coffee. Solubility is a characteristic that makes sugar molecules more soluble. Consequently, the word "solubility" can be used to describe a quality of a substance (solute). The metal halide salt potassium chloride (KCl, often known as potassium salt) is made up of both potassium and chlorine.
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add curved arrows to the reactants to show the formation of new bonds and the breaking of old bonds for the following diels–alder reaction. a double–barbed curved arrow is used to represent the movement of a pair of electrons. ignore lone pairs or non‑bonding electrons.
Draw curved arrows (0 the reactants to show the formation of new bonds and the breaking of old bonds in the following situations.
1. Diels -The double-burbed curved arrow used in the Alder reaction t0 represents the movement of a pair of electrons.
2. Disregard Ione pairs and non-bonding electrons.
3. Choose Dram More Erase Rings.
What is non -bonding electrons?An electron that is not involved in chemical bonding is referred to as a non-bonding electron. This can refer to a lone pair, where the electron is only found on one atom. The electron is delocalized throughout the molecule in a non-bonding orbital.To learn more about electron refer to:
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the meter was defined in 1963 as the length equal to 1650763.73 wavelengths of the orange red radiation emitted by the kryton-86 atom(the methr has since been redefined).what is the wavelenght of this tranision
The meter was defined in 1963 as the length equal to 1650763.73 wavelengths of the orange red radiation emitted by the kryton-86 atom. 606 nm is the wavelength.
Radiation is the name for energy that comes from a source and travels through space at the speed of light. In addition to being accompanied by an electric field and a magnetic field, this energy possesses wave-like characteristics. The term "radiation" can also refer to electromagnetic waves. Electromagnetic wave spectrum electromagnetic spectrum presented in its whole. Different types of electromagnetic radiation can be found in the natural world. Among them is visible light. Gamma rays, X-rays, and ultraviolet light are the three radiation types with the most energy. X-rays and gamma rays have a lot of energy. When they interact with atoms, they have the capacity to rob electrons from them, ionizing the atom. Protons and neutrons are mixed in unstable ways in radioactive atoms. An unstable atom will release energy on its own to move into a more stable state, which is radioactivity. The energy that is released by a radioactive atom is known as ionizing radiation. The term "radioactive isotope" refers to radioactive atoms of the same element with varying neutron counts.
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Which among the following is the most reactive halogen F Cl Br I?
Fluorine is the most reactive of all the elements in the periodic table.
It reacts all the other elements except the lighter noble gases (He, Ne and Ar). It reacts with "Xe" under mild condition to form 'Xe' fluorides.
Reactions of F(2) with many elements are vigorous and often explosives. In the passive form a few metals such as 'Cu, Ni, Fe' and 'Al' acquire a protective fluoride coating.
However ,if these metals are in powdered form (with a large surface area) or if the reaction mixture is heated ,then the reaction is vigorous. The reactivity of the other halogens decreases in the order 'Cl > Br > I.'
Chlorine and bromine reacts with most of the elements thorugh less vigorously than does fluoride. Iodine is less reactive and does not combine with some elements such as 'S' and 'Se'.
Fluorine and chlorine often oxidize elements further than do bromine and iodine, by this means bringing out ghigher valcances: 'PF_(5), PCl_(5), SF_(6)' etc.
The great reactivity of fluorine is attributable to two factors:
(i) The low bond dissociation enthalpy of the 'F-F' bond which results in a low activation energy for the energy.
(ii) The very strong bond which are formed.
Both of these properties arise form the small size of fluorine. The weak 'F-F' bond arises because of repulsion between the lone pair of electons on the two 'F' atoms. Strong bonds arise because of the high coordination number '(SF_(6))' and high lattice enthalpy '(CaF_(2))'
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the oxidation of the given alkene with osmium tetroxide produces diols. potential products are given (not all are correct). which statement is correct about the reaction?
It has been demonstrated that osmium tetroxide is a useful reagent for hydroxylating olefins into their corresponding 1,2-diols. OsO₄ can be employed either stoichiometrically or catalytically when secondary oxidizing agents are present (H₂O₂, hydroperoxides, amine N-oxides, etc.).
It has been demonstrated that this hydroxylation takes place through the mediation of Os(VI) cyclic osmate esters, which are then hydrolyzed to the diols. A structural analysis of several of these esters revealed that they can exist as syn- and anti-[Os₂O₄(O₂alkene)₂] dimers and , or as diester monomers [OsO₄(O₂alkene)₂] . It is possible to create isolable bis(adducts) in the presence of amines, particularly pyridine.
Even though these aren't organometallic complexes, the process by which they arise might use organometallic precursors. Recently, it has been proposed that the electropositive osmium core of the Osdouble bond bond is where an olefin will most likely attack [OsO₄]. Osmium metallacycles can rearrange to become cyclic diesters after first forming
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What is the amount of NaOH needed for preparation of 200 mL of 0.25 N solution?
2g is the amount of NaOH needed for preparation of 200 mL of 0.25 N solution
Given that;
Concentration of Solution = 0.25 N
Volume of solution = 200 ml = 0.2 L
To find the mass of NaOH we will use following equation ;
Normality(N) = [tex]\frac{Mass of NaOH(m)}{Molar mass of NaOH(M)}[/tex] ×[tex]\frac{1000}{Volume(in ml)}[/tex]
Molar mass of NaOH = 22 + 16 + 2 = 40g/mol
Thus,0.25 = [tex]\frac{Mass of NaOH(m)}{40}[/tex] × [tex]\frac{1000}{200}[/tex]
Mass of NaOH = 0.25 × 40 × 0.2
Mass of NaOH = 2 g
So, 2g of NaOH is Used to prepare 200ml of 0.25N solution
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calculate the volume of carbon (iv) oxide measured at S.T.P that is evolved when 1 mole of copper (ii) carbonate is heated to consant mass?
The volume of carbon (iv) oxide measured at S.T.P. that is evolved when one mole of copper (ii) carbonate is heated to constant mass is 22.4 L.
What is the volume of carbon dioxide produced?The volume of carbon dioxide produced when one mole of copper (ii) carbonate is heated to constant mass is given by the equation of the reaction given below;
CuCO₃ (s) ----> CuO (s) + CO₂ (g)
The mole ratio of the reaction shown above is 1 : 1 for copper carbonate and carbon dioxide.
From the equation of the reaction, one mole of copper carbonate when heated to a constant mass produces one mole of carbon dioxide.
The volume of one mole of carbon dioxide is equal to the volume of one mole of a gas.
The volume of one mole of a gas at STP is 22.4 L
Hence the volume of carbon dioxide evolved is 22.4 L
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