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19. (5 pts) How many grams of NaCN (molar mass = 49 g/mol) must be added to 0.54 L of water at 25.C to prepare

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19. (5 pts) How many grams of NaCN (molar mass = 49 g/mol) must be added to 0.54 L of water at 25.C to prepare a solution with a pH of 11.3? Assume that the volume of NaCN added is negligible. a) 7.1x10-14 g b) 12.1 g c) 22.4 g d) 6.5 g e) 32.9 g

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