Part B: Cu(NO3)2 + 2NaOH --> Cu(OH)2 + 2 NaNO3

Equation: Cu(NO3)2(l) + 2NaOH(l) --> Cu(OH)2(aq) + 2 NaNO3(aq)

Reaction:
This is the blue slurry formed by Cu(OH)3.

Accuracy:

When measuring 5 ml of NaOH be very careful and accurate.