1) What are the relative concentrations of the ions in a solution of aqueous sodium hydrogen sulfite?
(a) [Na+] = [H+] = [SO32-]
(b) [Na+] = [HSO3-]
(c) [Na+] = [H+] + [SO32-]
(d) [Na+] > [HSO3-] >> [H+] = [SO32-]
2) 15 mL of 0.10 M BaCl2 is mixed with 35 mL of 0.10 M AgNO3. What are the concentrations of the ions in the final mixture?
(a) [Ba2+] = 0.030 M, [Cl-] = 0 M, [Ag+] = 0 M, [NO3-] = 0.070 M
(b) [Ba2+] = 0.030 M, [Cl-] = 0 M, [Ag+] = 0.010 M, [NO3-] = 0.070 M
(c) [Ba2+] = 0.10 M, [Cl-] = 0.10 M, [Ag+] = 0 M, [NO3-] = 0.10 M
(d) [Ba2+] = 0.10 M, [Cl-] = 0.20 M, [Ag+] = 0.10 M, [NO3-] = 0.10 M
3) What is the mass of the solute in 250. mL of 0.122 M potassium phosphate?
(a) 2.90 g
(b) 6.47 g
(c) 0.0305 g
(d) 25.9 g
(e) 435 g
4) What is the mass of the solute in 1.5 L of 3.55 M calcium hydroxide?
(a) 213 g
(b) 5.33 g
(c) 31.3 g
(d) 263 g
(e) 395 g
5) The maximum concentration of p-dichlorobenzene in drinking water that is allowed by the EPA is 0.075 mg/L. Express this as a mass percent. Assume the density of the water is 1.00 g/mL.
(a) 7.5 x 10-7 %
(b) 7.5 x 10-8 %
(c) 7.5 x 10-3 %
(d) 7.5 x 10-6 %
6) What is the mass of the solute in 750. mL of 0.311 M potassium bromide?
(a) 287 g
(b) 9.12 g
(c) 27.8 g
(d) 37.0 g
(e) 233 g