
Concept explainers
Interpretation:
Empirical formula of hydrated nickel chloride has to be determined.
Concept Introduction:
The steps required for calculation of empirical formula is as follows:
1 Convert the data provided of each element in grams if not given in grams. If data is provided in percentage than total mass of compound is taken as
2 Mass of each element is changed into moles by division of given mass of each element with its
3 The value of mole of each element is divided by the smallest mole value and round off the resultant value to positive integer.
4 If resultant value is in fraction then multiply with smallest number to make it integer.
5 The final value of mole is used as a subscript for empirical formula.

Explanation of Solution
The hydrated nickel chloride contain
Step 1: The percentage
Step 2: The expression to calculate moles of elements is as follows:
The formula to calculate moles of
Substitute
The formula to calculate moles of
Substitute
The formula to calculate moles of
Substitute
Step 3: The positive integer for
Substitute
The positive integer for
Substitute
The positive integer for
Substitute
Therefore, the empirical formula for hydrated iron chloride is
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Chapter 13 Solutions
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