Chapter 4, Problem 67PS

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Chapter
Section

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

# What volume of 0.750 M Pb(NO3)2, in milliliters, is required to react completely with 1.00 L of 2.25 M NaCI solution? The balanced equation isPb(NO3)2(aq) + 2 NaCI(aq) → PbCl2(s) + 2 NaNO3(aq)

Interpretation Introduction

Interpretation:

It should be determined that the volume of 0.750MPb(NO3)2, in milliliters, which is required to react completely with 1.0Lof2.25MNaCl solution.

Concept introduction:

• Numberofmole=GivenmassofthesubstanceMolarmass
• The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).

Molarity=Amountofsolute(mol)Volumeofsolution(L)

• For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
• Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.
• Stoichiometric factor is a relationship between reactant and product which is obtained from the balanced chemical equation for a particular reaction.
Explanation

Balanced chemical equation for the given reaction is,

â€‚Â Pb(NO3)2(aq)â€‰+â€‰2â€‰NaCl(aq)â€‰â†’â€‰PbCl2(s)â€‰+â€‰2Na(NO3)(aq)

There are 2.25â€‰molNaCl in 1.00â€‰L of 2.25â€‰Mâ€‰NaCl.

By using the stoichiometric factor calculating the amount of Pb(NO3)2 required based on the amount of NaCl as follows,

â€‚Â 2.25â€‰molâ€‰NaClâ€‰Ã—1â€‰molâ€‰Pb(NO3)22molâ€‰NaClâ€‰â€‰=â€‰1

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