Chapter 3.4, Problem 3.14BFP

Interpretation Introduction

Interpretation:

The moles of aluminum that are needed to remove $0.253\text{ mol}$ of silver sulfide from a bowl of silver are to be determined. Also, a road map is to be drawn to show the planning of the solution.

Concept introduction:

In a balanced chemical equation, the total mass of reactants and products are equal in a balanced chemical equation, thus, it obeyed the law of conservation of mass. Also, the amount of substances in a balanced chemical reaction are stoichiometrically equivalent to each other.

Following are the steps to determine the moles of a chemical substance when the moles of another chemical substance present in the chemical reaction are given,

Step 1: Write the names and molecular formulas of the substances involved in the chemical reaction.

Step 2:  Write the balanced chemical equation by using stoichiometric coefficients.

Step 3: Determine the molar ratio from the balanced chemical reaction between the chemical substance whose amount is given and the chemical substance whose amount is to be calculated.

Step 4: Use the molar ratio and the given amount to calculate the unknown amount of the other substance.