Question

6. (10 points) A 0.9929-g sample containing dimethylphthalate, C6H4(COOCH3)2 (194.19 g/mol), and unreactive (inert) 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 + 2OH-  C6H4(COO)22- + 2CH3OH. After the reaction was complete, the excess NaOH was back-titrated with 24.53 mL of 0.1613 M HCl. Calculate the percentage of dimethylphthalate in the sample.

Answer 1

n6.of n ole of Hu: nolom竹 volume (L): Ο. 1613x klyssx'o 3 9 6 Xib Mole toted no of m6la, ot --aa6H ; 6-12.IS x SD x→ニ 6' 075 χ 10. Mole 了 3 6-4I1 un sample. 0 9929