What mass of sodium nitrite must be added to 350.0 mL of water to give a solution with pH = 8.40? Ka of HNO2 = 5.6 x 10 -4
A) 68 g
B) 1.7 x 10-4 g
C) 0.039 g
D) 8.5 g
E) 24 g
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