Question

Complete and balance the following compound $A{g}^{+}+As{H}_3\to H_{3}As{O}_3+H^{+}+$__________.

Answer 1

$As{H}_3$ is good reducing agent so it reduces $A{g}^{+}$ to $Ag$ and itself oxidises from -3 to +3.

$6{Ag}^{+}+{AsH}_3+{3H}_{2}O\to H_{3}As{O}_3+6H^{+}+6Ag$