What is the first step in solving a stoichiometric problem?

• A. Balance the chemical equation.
• B. Calculate the theoretical yield.
• C. Convert grams to moles.
• D. Identify the limiting reactant.

Answer: (A)

Verified step by step guidance

1. Begin by writing the balanced chemical equation for the reaction. This ensures that the law of conservation of mass is satisfied, meaning the number of atoms for each element is the same on both sides of the equation.
2. Identify the given information and what you need to find. This could include the masses of reactants or products, the number of moles, or the volume of gases at standard conditions.
3. Convert all given quantities (such as mass or volume) into moles using the molar mass of the substances involved. This is crucial because stoichiometric calculations are based on mole ratios.
4. Use the balanced chemical equation to set up mole ratios. These ratios will help you determine how much of each reactant is needed or how much product can be formed.
5. Determine the limiting reactant, if necessary, by comparing the mole ratios of the reactants used. The limiting reactant is the one that will be completely consumed first, thus determining the maximum amount of product that can be formed.