Consider the reaction: 2 NiO(s) ⟶2 Ni(s)+O2(g) If O2 is collected over water at 40.0^∘ C and a t

Name: Problem 101, Chapter 5: Chemistry A Molecular Approach
Uploaded: 2021-10-26T16:24:35-08:00
Duration: 1 min 25 s
Channel: David Collins
Description: Consider the reaction: 2 NiO(s) ⟶2 Ni(s)+O2(g) If O2 is collected over water at 40.0^∘ C and a total pressure of 745 mm Hg, what volume of gas is collected for the complete reaction of 24.78 g of NiO?

step 1 To determine the volume of oxygen that is created, we first need to figure out how many moles of

Question

Consider the reaction: $$2 \mathrm{NiO}(s) \longrightarrow 2 \mathrm{Ni}(s)+\mathrm{O}_{2}(g)$$ If $\mathrm{O}_{2}$ is collected over water at $40.0^{\circ} \mathrm{C}$ and a total pressure of $745 \mathrm{mm} \mathrm{Hg},$ what volume of gas is collected for the complete reaction of 24.78 $\mathrm{g}$ of NiO?

   Consider the reaction:
$$2 \mathrm{NiO}(s) \longrightarrow 2 \mathrm{Ni}(s)+\mathrm{O}_{2}(g)$$
If $\mathrm{O}_{2}$ is collected over water at $40.0^{\circ} \mathrm{C}$ and a total pressure of
$745 \mathrm{mm} \mathrm{Hg},$ what volume of gas is collected for the complete reaction of 24.78 $\mathrm{g}$ of NiO?

Chemistry A Molecular Approach

Nivaldo J. Tro 4th Edition

Chapter 5, Problem 101

Instant Answer

Solved by Expert David Collins

10/26/2021

Step 1

The molar mass of NiO is approximately 74.69 g/mol. So, the number of moles of NiO is given by the mass of NiO divided by its molar mass. That is, $$\text{moles of NiO} = \frac{24.78 \, \text{g}}{74.69 \, \text{g/mol}} = 0.3318 \, \text{mol}.$$ Show more…

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Consider the reaction: $$2 \mathrm{NiO}(s) \longrightarrow 2 \mathrm{Ni}(s)+\mathrm{O}_{2}(g)$$ If $\mathrm{O}_{2}$ is collected over water at $40.0^{\circ} \mathrm{C}$ and a total pressure of $745 \mathrm{mm} \mathrm{Hg},$ what volume of gas is collected for the complete reaction of 24.78 $\mathrm{g}$ of NiO?

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Key Concepts

Stoichiometry

This concept involves using the balanced chemical equation to relate the quantities of reactants and products by moles. In the context of the problem, it means converting the given mass of a reactant (NiO) into moles and using the reaction coefficients to predict the number of moles of oxygen gas produced.

Ideal Gas Law

The ideal gas law (PV = nRT) is used to calculate the volume of a gas when its number of moles, the temperature, and the pressure are known. It links the macroscopic properties of gases, allowing for the determination of volume from the amount of gas produced in a chemical reaction.

Partial Pressure and Vapor Pressure Correction

When a gas is collected over water, the total pressure measured is a combination of the gas pressure and the water vapor pressure. Correcting for the water vapor pressure is essential to accurately determine the pressure of the gas of interest, which in turn is used in the ideal gas law to calculate its volume.

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