18. Aqueous Equilibrium
Intro to Buffers
Multiple Choice
Multiple ChoiceWhat mass of NaC2H3O2 (molar mass = 82.03 g/mol) would need to be added to 0.450 moles of HC2H3O2 to prepare a 1.0 L buffer with a pH = 4.95. Ka for HC2H3O2 = 1.8 × 10−5.
A
0.277 g
B
0.730 g
C
22.7 g
D
59.9 g
E
295 g
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