1. How many moles of Na₂S will be required to completely react with 40.0 mL of 0.200 M Fe(NO₃)₃?
3 Na₂S (aq) + 2 Fe(NO₃)₃ (aq) → Fe₂S₃ (s) + 6 NaNO₃ (aq)

2. How many moles of a precipitate is formed when 25.0 mL of 1.00 M FeCl₃ reacts with 25.0 mL of 1.50 M AgNO₃ in the following chemical reaction?
FeCl₃ (aq) + 3 AgNO₃ (aq) → 3 AgCl (s) + Fe(NO₃)₃ (aq)