Concept explainers
Interpretation:
Mass percentage of Cu needs to be determined in
Concept introduction:
The percentage of an element in a compound can be calculated as follows:
Percentage of an element in a compound
Answer to Problem 174A
Percentage of Cu in Cu3 (OH) 4SO4 and Cu4 (OH) 6SO4 are 53.74 and 56.19 respectively.
Explanation of Solution
Molar mass of Cu3 (OH) 4SO4 and Cu4 (OH) 6SO4 are 354.5 g/mol and 452 g/mol respectively.
Now, there are 3 Cu atoms in Cu3 (OH) 4SO4and 4 Cu atoms in Cu4 (OH) 6SO4thus, mass percent of Cu in both compounds will be:
% of Cu in Cu3 (OH) 4SO4
% of Cu in Cu4 (OH) 6SO4
Thus, the percentage of Cu in Cu3 (OH) 4SO4 and Cu4 (OH) 6SO4 are 53.74% and 56.19% respectively.
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Chemistry: Matter and Change
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