Question

What are the balanced chemical equations for the following reactions by using the activity series? If no reaction occurs, simply write NR.

(a) Nickel metal is added to a solution of copper(II) nitrate
(b) A solution of zinc nitrate is added to a solution of magnesium sulfate.
(c) hydrochloric acid is added to a gold metal
(d) chromium metal is immersed in an aqueous solution of cobalt(II) chloride
(e) hydrogen gas is bubbled through a solution of silver nitrate