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Home  >>  JEEMAIN and AIPMT  >>  Chemistry  >>  Equilibrium
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For the reaction $S_2O_3^{2-} (aq) + 2H_3O^+ (aq) \rightleftharpoons S (s) + H_2SO_3 (aq) + H_2O(l)$; Rate = $k [H_3O^+][S_2O_3^{2-}]$. Reaction is fastest in

(a) 0.1 M $CH_3COOH$

(b) 0.1 M $H_2SO_4$

(c) 0.1 M HCl

(d) 0.1 M NaOH

Can you answer this question?

1 Answer

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Answer: 0.1 M $H_2SO_4$
The reaction will be fastest when $[H_3O^+]$ is maximum.
$[H^+]$ from 0.1 M $CH_3COOH$ < 0.1 M
$[H^+]$ from 0.1 M $H_2SO_4$ = 0.2 M
$[H^+]$ from 0.1 M $HCl$ = 0.1 M
$[H^+]$ from 0.1 M $NaOH$ $10^{-13}$ M


answered Nov 29, 2013 by mosymeow_1

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