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Chapter 3: Problem 62

Describe the steps involved in the mole method.

Short Answer

Expert verified
The mole method involves the following steps: writing down the balanced chemical equation, converting known quantities into moles, using stoichiometric ratios from the balanced equation to calculate moles of other substances, and if needed, converting moles back to grams.

Step by step solution

01

Write Down The Balanced Chemical Equation

The first step is to write down the balanced chemical equation of the reaction. All reactants and products, and their stoichiometric coefficients need to be clearly stated.
02

Convert to Moles

If you know the weight of any substance involved, convert this value into moles using the molar mass of the substance (which can be derived from its molecular formula).
03

Use Stoichiometric Ratios

Use the stoichiometric ratios of reactants and products that result from the balanced equation to calculate the moles of other substances. This can be applied to find unknown reactants and products.
04

Convert Back To Grams If Needed

If necessary, especially if the problem asks for solution in grams, convert moles back into grams by multiplying the amount in moles by the substance's molar mass.

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Most popular questions from this chapter

Define limiting reagent and excess reagent. What is the significance of the limiting reagent in predicting the amount of the product obtained in a reaction? Can there be a limiting reagent if only one reactant is present?

Calculate the number of \(\mathrm{C}, \mathrm{H},\) and \(\mathrm{O}\) atoms in \(1.50 \mathrm{~g}\) of glucose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)\), a sugar.

Titanium(IV) oxide \(\left(\mathrm{TiO}_{2}\right)\) is a white substance produced by the action of sulfuric acid on the mineral ilmenite \(\left(\mathrm{FeTiO}_{3}\right)\) $$ \mathrm{FeTiO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow \mathrm{TiO}_{2}+\mathrm{FeSO}_{4}+\mathrm{H}_{2} \mathrm{O} $$ Its opaque and nontoxic properties make it suitable as a pigment in plastics and paints. In one process \(8.00 \times 10^{3} \mathrm{~kg}\) of \(\mathrm{FeTiO}_{3}\) yielded \(3.67 \times\) \(10^{3} \mathrm{~kg}\) of \(\mathrm{TiO}_{2}\). What is the percent yield of the reaction?

Why is the theoretical yield of a reaction determined only by the amount of the limiting reagent?

Calculate the molar mass of the following substances: (a) \(\mathrm{Li}_{2} \mathrm{CO}_{3},\) (b) \(\mathrm{CS}_{2},\) (c) \(\mathrm{CHCl}_{3}\) (chloroform), (d) \(\mathrm{C}_{6} \mathrm{H}_{8} \mathrm{O}_{6}\) (ascorbic acid, or vitamin \(\mathrm{C}\) ), (e) \(\mathrm{KNO}_{3},\) (f) \(\mathrm{Mg}_{3} \mathrm{~N}_{2.}\)
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