Page 1From mass - ReviewFor A and B that appear in the same chemical equation, using the mass of substance A to find the concentration of a solution of B if the volume is given
15 marksPage 2Practice Problem 1Excess Na2SO4 added to a 500 mL sample of polluted water resulted in the formation of 1.00 g PbSO4. Calculate the concentration in mol L–1 of Pb2+ in the polluted water.
Pb2+(aq) + Na2SO4(aq) → PbSO4(s) + 2Na+(aq)
Page 3From mass - ReviewFor A and B that appear in the same chemical equation, using the mass of substance A to find the volume of a solution of B if the concentration is given
15 marksPage 4Practice problem 2During the development of black-and-white photographs, AgBr(s) dissolves to form Ag(S2O3)23–. What volume of 0.0312 mol L–1 Na2S2O3 dissolves 0.135 g AgBr.
AgBr(s) + 2S2O32–(aq) → Ag(S2O3)23–(aq)+ Br–(aq)
Page 5From concentration, volume - ReviewFor A and B that appear in the same chemical equation, using the concentration and volume of substance A to find the mass of B
15 marksPage 6Practice Problem 3Electrolysis of aqueous NaCl gives the products shown below. Calculate the mass in grams of Cl2 that can be produced from 1.00 L of 0.150 mol L–1 NaCl.