   Chapter 13, Problem 112AP ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

#### Solutions

Chapter
Section ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
1 views

# arbon dioxide gas. saturated with water vapor, can be produced by the addition of aqueous acid to calcium carbonate.msp;  CaCO 3 ( s ) + 2H + ( a q )   Ca 2 + ( a q ) + H 2 O ( l ) + CO 2 ( g ) w many moles of CO 2 ( g ) , collected at 6 0.   ° C and 774 torr total pressure, are produced by the complete reaction of 1 0.0  g of CaCO 3 with acid? What volume does this wet CO 2 occupy? What volume would the CO 2 occupy at 774 torr if a desiccant (a chemical drying agent) were added to remove the water? (The vapor pressure of water at 6 0.   ° C is 149 . 4 mm Hg .)

Interpretation Introduction

Interpretation:

The number of moles of CO2(g) should be calculated. The volume of CO2 occupied should be calculated under both conditions.

Concept Introduction:

According to ideal gas equation:

PV=nRT

Here, P is pressure, V is volume, n is number of moles, R is Universal gas constant and T is temperature.

The value of Universal gas constant can be taken as 0.082 L atm K1 mol1.

Mass of gas can be calculated from number of moles and molar mass as follows:

m=n×M

Here, n is number of moles, m is mass and M is molar mass.

Explanation

Calculation:

The balanced chemical reaction is as follows:

CaCO3(s)+2H+(aq)Ca2+(aq)+H2O(l)+CO2(g)

Calculate number of moles of CaCO3 as follows:

n=mM

Molar mass of CaCO3 is 100.1 g/mol thus,

n=10 g100.1 g/mol=0.0999 mol

From the balanced chemical reaction, 1 mol of CaCO3 produces 1 mol of CO2(g) thus, 0.0999 mol of CaCO3 will produces 0.0999 mol of CO2(g)

For the given temperature and pressure, volume of wet CO2(g) can be calculated using the ideal gas equation as follows:

V=nRTP

Convert the given temperature from C to K:

0 C=273.15 K

Thus,

60 C=(60+273.15) K=333.15 K

Also, convert pressure from torr to atm as follows:

1 atm=760 torr

Thus,

774 torr=774 torr(1 atm760 torr)=1

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