Chemistry 1210 Quiz 7A 10/21/02 Dr. B. Jackson

71. Code A

72. 0.12 M H₃(PO₄) is ______ N H₃(PO₄)

a) 0.12 b) 0.24 c) 0.36 d) 0.06 e) 0.04

73. 2 N NaOH is _______ M NaOH

a) 2 b) 1 c) 4

74. 6 grams NaCl (MW 58.5) was in 50 mL of solution. What is the percent concentration?

a) 3 b) 6 c) 12

75. 6 grams NaCl (MW 58.5) was dissolved in 50 mL of solution. What is the molar concentration?

a) 0.102 M b) 2 M c) 0.2 M d) 1 M

76. How many grams of NaOH (MW 40) are present in 25 mL of a 2% solution?

a) 2 b) 0.2 c) 0.5 d) 2.5

77. How many grams of NaOH (MW 40) are present in 25 mL of a 0.2 M solution?

a) 2 b) 0.2 c) 0.025 d) 0.005

78. What volume of a 5% solution of NaCl (MW 58.5) would contain 1.0 gram of NaCl?

a) 1.0 mL b) 5.0 mL c) 10 mL d) 20 mL

79. What volume of a 0.5 M solution of NaCl (MW 58.5) would contain 1.0 gram of NaCl?

a) 17 mL b) 34 mL c) 8.5 mL d) 58.5 mL

80. What would be the osmolarity of a 0.2 M NaCl?

a) 0.1 osmol b) 0.2 osmol c) 0.4 osmol

Ans: 71a; 72c; 73a; 74c; 75b; 76c; 77b; 78d; 79b; 80c

Wednesday, March 21, 2007 01:28:01 PM