Question

When 12.0 mL of a 2.24×10^-4 M copper(II) nitrate solution is combined with 15.0 mL of a 8.50×10^-5 M sodium hydroxide solution does a precipitate form?  (yes or no)

For these conditions the Reaction Quotient, Q, is equal to?

Answer 1

Yes the solution does a precipitate.

Solutions of copper (II) compounds will undergo precipitation reactions with sodium hydroxide solution when mixed together to produce a bright blue precipitate of copper (II) hydroxide and a solution of a sodium salt.

The chemical equations for the reaction between Copper (II) nitrate and Sodium hydroxide are as follows:

Cu(NO₃)₂ (aq) + 2NaOH (aq) → Cu(OH)₂ (s) + 2NaNO₃ (aq)

Reaction Quotient, Q = [NaNO₃]²/[Cu(NO₃)₂][NaOH]²