First slide

Ionic equilibrium

Question

Which is not the hydrolysis reaction?

Moderate

A

$NaCl + H_{2} O ⇌ NaOH + HCl$
B

${CH}_{3} COONa + H_{2} O ⇌ {CH}_{3} COOH + NaOH$
C

${CuSO}_{4} + 2 H_{2} O ⇌ Cu (OH)_{2} + H_{2} {SO}_{4}$
D

${CH}_{3} {COOC}_{2} H_{5} + H_{2} O ⇌ {CH}_{3} COOH + C_{2} H_{5} OH$

Solution

Hydrolysis is the interaction of cation or anion or both of a salt (or organic ester, etc) to form acidic/basic/neutral solution.Salt of strong acid and strong base is not hydrolysed
Thus, or NaCl (salt of strong acid (HCI) and strong base (NaOH)) does not react with H₂O.
$(b) {CH}_{3} {COO}^{-} + H_{2} O ⇌ \underset{Weak acid}{{CH}_{3} COOH} + \underset{Basic}{{OH}^{-}}$
$(c) {Cu}^{2 +} + 2 H_{2} O ⇌ {Cu (OH)_{2}}_{week base} + \underset{Acidic}{2 H^{+}}$
$(d) {CH}_{3} {COOC}_{2} H_{5} + H_{2} O ⇌ {CH}_{3} COOH + C_{2} H_{5} OH$
${CH}_{3} COOH > C_{2} H_{5} OH (acid)$
Hence, solution is acidic

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