Problem

A 0.9471-g sample containing dimethylphthalate, C6H4(COOCH3)2 (194.19g/mol), andnreactive...

A 0.9471-g sample containing dimethylphthalate, C6H4(COOCH3)2 (194.19

g/mol), and

nreactive species was refluxed with 50.00 mL of 0.1215 M NaOH to hydrolyze the ester groups (this

process is called saponification).

C6H4(COOCH3)2 + 2OH2 → C6H4(COO)22- + 2CH3OH

After the reaction was complete, the excess NaOH was back-titrated with 24.27 mL of 0.1644 M HCl.

alculate the percentage of dimethylphthalate in the sample.

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