Answers
1. Calculate the mass of solid NaCl that must be added to 1.50 L of a 0.100 M AgNO3 solution to precipitate
all of the Ag+ ions in the form of AgCl. Calculate the mass of AgCl formed.
Answer= 8.76 g NaCl required; 21.5 g AgCl produced
2. Calculate the mass of solid sodium sulfate that must be added to 250.0 mL of a 0.200 M solution of barium
nitrate to precipitate all of the barium ions in the form of barium sulfate. Also calculate the mass of
barium sulfate formed.
Answer= 7.10 g Na2SO4 required; 11.7 g BaSO4 produced
3. Calculate the mass of NaI that must be added to 425.0 mL of a 0.100 M Pb(NO3)2 solution to precipitate
all of the Pb2+ ions as PbI2. Also calculate the mass of PbI2 formed.
Answer= 12.7 g NaI required; 19.6 g PbI2 produced
4. When Ba(NO3)2 and K2CrO4 react in aqueous solution, the yellow solid BaCrO4 is formed. Calculate the
mass of BaCrO4 that forms when 3.50 x 10-3 mol of solid Ba(NO3)2 is dissolved in 265 mL of 0.0100 M
K2CrO4 solution.
Answer= 0.671 g BaCrO4 produced
5. Calculate the mass of the white solid CaCO3 that forms when 25.0 mL of a 0.100 M Ca(NO3)2
solution is mixed with 20.0 mL of a 0.150 M Na2CO3 solution.
Answer= 0.250 g CaCO3
6. When aqueous solutions of Na2SO4 and Pb(NO3)2 are mixed, PbSO4, precipitates. Calculate the mass
of PbSO4 formed when 1.25 L of 0.0500 M Pb(NO3)2 and 2.00 L of 0.0250 M Na2SO4 are mixed.
Answer=15.2 g PbSO4
7. Calculate the mass of the blood-red solid Ag2CrO4 that forms when 50.0 mL of a 0.250 M AgNO3
solution is mixed with 30.0 mL of a 0.250M K2CrO4 solution.
Answer=2.07 g Ag2CrO4