Chemistry: Atoms First (2nd Edition)

Published by Cengage Learning
ISBN 10: 1305079248
ISBN 13: 978-1-30507-924-3

Chapter 13 - Exercises - Page 575e: 105


$H_2SO_3(aq) + H_2O(l) \lt -- \gt HS{O_3}^-(aq) + H_3O^+(aq)$ $HS{O_3}^-(aq) + H_2O(l) \lt -- \gt S{O_3}^{2-}(aq) + H_3O^+(aq)$

Work Step by Step

1. Write the reaction where $H_2SO_3$ behaves as an acid in water. $H_2SO_3(aq) + H_2O(l) \lt -- \gt HS{O_3}^-(aq) + H_3O^+(aq)$ - It will donate one proton to the water molecule, producing $H_3O^+$. 2. Write the reaction where the conjugate base acts as an acid: $HS{O_3}^-(aq) + H_2O(l) \lt -- \gt S{O_3}^{2-}(aq) + H_3O^+(aq)$ - Since $S{O_3}^{2-}$ can't donate protons, the dissociation stops there.
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