Question

Predict the precipitate produced by mixing an Al(NO3)3 solution with a NaOH solution

Answer 1

Al(NO3)3 (aq) + 3 NaOH (aq) ------> Al(OH)3 (s) + 3 NaNO3 (aq) 

Al(OH)3 is the precipitate. We can predict that because it is insoluble in water. 

Al+3 (aq) + 3 OH- (aq) -----> Al(OH)3 (s)