   Chapter 9, Problem 9CR ### 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

# alanced chemical equations give us information in terms of individual molecules reacting ¡n the proportions indicated by the coefficients, and also in terms of macroscopic amounts (that is, moles). Write a balanced chemical equation of your choice, and interpret in words the meaning of the equation on the molecular and macroscopic levels.

Interpretation Introduction

Interpretation:

The question asks to explain the meaning of a balanced chemical equation both at molecular and macroscopic levels.

Concept Introduction:

Daltons’ atomic theory states that matter cannot be created or destroyed. Since matter is composed of atoms and molecules in order to be consistent with this principle one has to make sure that the number of atoms/molecules of each type of atoms are equal on both sides of the reaction.

There can be many ways of achieving this using several set of coefficients in front of each reactants and products. But the combination with the lowest possible integers are the valid stoichiometric coefficients in a balanced chemical reaction.

Explanation

The balanced chemical reaction is as follows:

Na2SO4(aq) + CaCl2(aq)2NaCl(aq) + CaSO4(s)

In this reaction, the reactants are Na2SO4(aq) and CaCl2(aq) while the two products are NaCl(aq) and CaSO4(s). The stoichiometric coefficients of Na2SO4(aq), CaCl2(aq), NaCl(aq) and CaSO4(s) are 1, 1, 2 and 1 respectively. These stoichiometric ratios represent the combination containing the smallest possible integers which makes the number of atoms of each type are equal on both sides

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