When 20 g of naphtholic acid (C11H8) is dissolved in 500 g of benzene ( = 1.72 K kg mol^-1), a freez — Solutions and Colligative Properties Chemistry Question
Question
When 20 g of naphtholic acid (C11H8$O_2$) is dissolved in 500 g of benzene ($K_f$ = 1.72 K kg mol^-1), a freezing point depression of 2 K is observed. The Van't Hoff factor (i) is
Answer: A
💡 Solution & Explanation
Carboxylic acids associate (dimerize) in benzene. The van 't Hoff factor for dimerization is i = 0.5.
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