Interpretation : The percentage of calcium carbonate in the limestone is to be calculated.
Concept Introduction : The coefficients of a balanced chemical equation that are transformed into moles are used to calculate the mole ratio, which is a conversion factor.
When converting between a certain number of moles of one reactant or product and moles of another reactant or product, mole ratios are utilized.
The formula to calculate the number of moles is given as
The formula to calculate the percentage yield is given as
Answer to Problem 78A
The percentage of calcium carbonate in the limestone is
Explanation of Solution
Mass of limestone is
Mass of calcium chloride formed is
The given chemical equation is as follows:
Molar mass of
Molar mass of O is
Molar mass of
Molar mass of
Mass of
Mass of
To calculate the moles of
The moles of
So, the moles of
To calculate the mass of
The theoretical mass of limestone is
To calculate the actual mass of
Chapter 12 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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