Determine the exact formula of an acid
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An organic acid has a molecular weight of 192. A 100 mg sample of this acid was burned in an apparatus. The only compounds that make up this acid are carbon, hydrogen and oxygen. In the U tube apparatus, 137.53 mg of carbon dioxide was caught and 37.8 mg of water was caught. Determine the exact formula of the acid. Make sure that the formula weight equals 192. Please explain how to do it. Thank you.
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The expert determines the exact formula of an acid.
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Solution:
A. Determine the % of C (from combustion analysis)
137.53 mg CO2 X (12 mg C/44 mg CO2) = 37.51 mg C
% C = (37.51 mg C / 100 mg compound) X 100= 37.51 % C
B. Determine the % of H (from combustion analysis)
37.8 mg H2O X ...
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