Question

For the redox reaction
$C{r}_2{O}_7^{-2}+H^{+}+Ni\to C{r}^{3+}+N{i}^{2+}+H_{2}O$ The correct coefficients of the reactants for the balanced reaction are

	$C{r}_2{O}_7^{2-}$	Ni	$H^{+}$
a	1	3	14
b	2	3	14
c	1	1	16
d	3	3	12

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (A)

The balanced equation is
$C{r}_2{O}_7^{2-}+14H^{+}+3Ni\to 2C{r}^{3+}+7H_{2}O+3N{i}^{2+}$