
Concept explainers
(a)
Interpretation: The mass of
Concept Introduction: The number of moles is calculated using the formula:
(a)

Answer to Problem 9.45FU
Explanation of Solution
Given:
Mass of naphthol = 2.2 x 102 kg
Molar mass of naphthol = 144.17 g/mol
Equality:
1 kg = 1000 g
1 mole napthol = 144.17 g
1 mole napthol = 1 mole
1 mole
(b)
Interpretation: The theoretical yield of
Concept Introduction: The number of moles is calculated using the formula:
(b)

Answer to Problem 9.45FU
The theoretical yield of
Explanation of Solution
Given:
Mass of napthol = 100 g
Molar mass of napthol = 144.17 g/mol
Mass of phosgene = 100 g
Molar mass of phosgene = 98.92 g/mol
Equality:
1 mole of phosgene = 98.92 g of phosgene
1 mole napthol = 144.17 g of napthol
Convert mass to moles;
The molar ratio of naphthol and phosgene is 1:1 thus, limiting reagent can be determined by just seeing the moles of both reactants.
Since moles of napthol are less so it must be limiting reagent and will determine the amount of product.
1 mole napthol = 1 mole
1 mole
Hence
(c)
Interpretation: The percent yield should be calculated if the actual yield of
Concept Introduction: The actual yield of the product is the amount of product which is formed at the end of reaction experimentally whereas theoretical yield represents the amount of product calculated by expecting that 100 % of reactant changes to product. The percent yield can be shown as:
(c)

Answer to Problem 9.45FU
The percent yield of
Explanation of Solution
Given:
Actual yield of
Theoretical yield = 143.4 g
Plug the values;
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Chapter 9 Solutions
Basic Chemistry (5th Edition)
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