Chemistry 102: Acid Equilibrium: Find net equation for pt 1 & 2

Question

7.When a strong base is added to a solution of CuSO₄, which is pale blue, a precipitate forms and the solution above the precipitate is colorless.

part 1). Include phases in the balanced chemical equations.

What is the net chemical equation that describes this reaction? 

part 2). When ammonia is then added, the precipitate dissolves and the solution turns a deep navy blue. What is the net chemical equation that describes this event?

Answer 1

Part 1: what is the strong base? One can assume it be a IA group metal hydroxide, such as NaOH, or KOH.

Physical states should be placed in a parenthesis, with aq - aqueous solution, s-solid, l-liquid and g-gas.

After writing a complete chemical equation in which copper (II) hydroxide and sodium or potassium sulfate are products, balance the equation if necessary starting from the most complex chemical, then balance one elements followed by another, finally the simplest chemical. To write a net ionic equation, first an ionic equation should be written, followed by deletion of spectator ions.

Part 2: the deep navy blue represents a copper-ammonia complex. Be sure to understand ammonia is a weak base and should be written in molecular form.