   Chapter 13, Problem 140AP ### 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

# he following demonstration takes place in a two-step process:rst, solid calcium carbide ( CaC 2 j ) reacts with liquid water to produce acetylene gas ( C 2 H 2 ) and aqueous calcium hydroxide. Second the acetylene gas produced is then ignited with a match, causing the combustion reaction of acetylene with oxygen gas to produce gaseous carbon dioxide and gaseous water. Write the balanced equations for each reaction that is occurring, including all phases. If a 1 00.0 − g sample of calcium carbide ( CaC 2 ) is initially reacted with 5 0.0  g of water, which reactant is limiting? Now imagine that the final gases produced are collected in a large bulkier and allowed to cool to room temperature. Using the information from part b ( l 00.0  g of Cec 2 reacting with 5 0.0  g of H 2 O ), how many liters of carbon dioxide gas were produced in the balloon at a pressure of 1 .00 atm and 25  ° C ?

Interpretation Introduction

(a)

Interpretation:

The balance chemical equation for the combustion of ethyne and reaction of calcium carbide to produce ethyne.

Concept Introduction:

When the number of atoms of an element on the product side and on the reactant side is equal then such reaction is said to be a balanced chemical equation.

Explanation

The balance equation indicates that all the number of same atoms must be equal at both sides. Hence we have to write the reactants and products of the reaction and balance each atom at both sides.

CaC2(s)+ H2O(l) C2H2(g)+ CaOH2(aq)

In this reaction equation, number of C and Ca is balanced at both sides. Hence we have to balance H and O. To balance H; add 2 as coefficient with H2 O that changes the equation as;

CaC2(s)+ 2H2O(l) C2H2(g)+ CaOH2(aq)

Now O and H both are balanced hence it is a balance equation

Interpretation Introduction

(b)

Interpretation:

Identify the limiting reactant if 100.0- g sample of calcium carbide is initially reacted with 50.0 g of water.

Concept Introduction:

The reactant that forms less amount of product is called as limiting reagent and which limits the reaction and determine the amount of product formed.

Interpretation Introduction

(c)

Interpretation:

The volume of carbon dioxide gas which is produced in the balloon at a pressure of 1.00 atm and 25° C.

Concept Introduction:

The ideal gas equation is given by:

PV = nRT

Where, P = pressure

V = volume

n = number of moles

T = temperature

R = gas constant

By knowing the value of pressure, temperature and number of moles, one can identify the value of volume.

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