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Rate Laws and Catalysts

APCHEM-JZNDYG

$$S_2O_3^{2-} \longrightarrow SO_3^{2-}+ S$$

The preceding reaction was carried out in the presence of an acid-base catalyst. The reaction is found to be first order with respect to $S_2O_3$ $^{2-}$.

Which of the following statements in NOT true about the reaction?

A

The rate law is $\text{rate} =k[S_2O_3$ $^{2-}]$.

B

$H^+$ was most likely used as a homogeneous catalyst for the reaction.

C

The unit for the rate constant, $k$, is $M^{-1}s^{-1}$.

D

The half-life of this reaction is independent of the initial concentration of $S_2O_3$ $^{2-}$.