Concept explainers
(a)
Interpretation:
0.1235-g of
Concept introduction:
Number of moles can be calculated by using following formula,
(a)
Explanation of Solution
Given,
0.1235-g of
The given acid diacid, therefore two moles of base is neutralizing the mole of acid, so, the balanced chemical equation is given below,
Moles of
Molar mass of
Therefore, the molar mass is
(b)
Interpretation:
The Empirical formula of diacid has to be calculated.
Concept introduction:
Formula for determine the molecular formula of the compound is given below,
Combustion reaction:
Combustion is an exothermic reaction between a fuel (the reductant) and an oxidant. Oxidant is usually atmospheric oxygen.
Generally organic molecule undergoes combustion reaction which produces carbon dioxide and water molecule.
(b)
Explanation of Solution
0.1235-g of
Molar mass of carbon dioxide =
Moles of carbon is calculated as follows,
Moles of hydrogen is calculated as follows,
Grams of carbon is calculated as follows,
Grams of hydrogen is calculated as follows,
Grams of oxygen is calculated as follows,
Moles of oxygen is calculated as follows,
Divide through by smallest number:
Therefore,
The Empirical formula for propionic acid is calculated as follows,
Multiply with two to get the whole numbers,
The empirical formula =
(b)
Interpretation:
The molecular formula of diacid has to be calculated.
Concept introduction:
Formula for determine the molecular formula of the compound is given below,
(b)
Explanation of Solution
The empirical formula is
The molar mass of the compound is calculated as follows,
Formula for the compound is given below,
Therefore, to get the molecular formula, multiple with two.
Hence, the molecular formula of the compound is
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Chapter 3 Solutions
Chemistry: The Molecular Science
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