Answer to Question #60116 in Physical Chemistry for joseph orobiyi

Question

1 For the following reaction, which of the following is a conjugate
acid-base pair? $HC_2O_4^-(aq)$ + $H_2O(l)$ $\rightarrow$ $H_3O^+$(aq) +
$C_2O_4^{2-}$(aq)
$HC_{2}O_{4}^{-}$ and $H_{2}O$
$H_{2}O$ and $C_{2}O{4}^{2-}$
$HC_2O_4^-$ and $H_3O^+$
$HC_{2}O_{4}^{-}$ and $C_{2}O_{4}^{2-}$



2 In the following reaction, which is a Brønsted-Lowry base?
$HC_{2}O_{4}^{-}(aq) + H_{2}O(l) \rightarrow H_{3}O^{+}(aq) +
C_{2}O_{4}^{2-}(aq)$
$HC_{2}O_{4}^{-}$
$H_{2}O$
$H_{3}O^+$
None of these



3 A Brønsted-Lowry base is defined as a substance that
acts as a proton donor.
increases [H+] when placed in water.
acts as a proton acceptor.
decreases [H+] when placed in water.

Answer 1

1. For the reaction:
HC_2 O_4^-+H_2 O→C_2 O_4^(2-)+H_3 O^+
acid-base conjugate pairs are HC_2 O_4^- and C_2 O_4^(2-), also H_3 O^+ and H_2 O. Then, right answer is (4): HC_2 O_4^- and C_2 O_4^(2-).
2. In this reaction, Brønsted-Lowry base is water, H_2 O.
3. A Brønsted-Lowry base is defined as a substance that acts as a proton acceptor.