Consider two solutions of acetic acid (CH3COOH, Ka = 1.8 x 10-5) of different concentrations: 1) 0.500 M and 2) 0.010 M. Which solution has the lowest (most acidic) pH, and which has the greatest percent dissociation?

a) 1 and 1

b) 1 and 2

c) 2 and 2

d) 2 and 1

a) 1 and 1

b) 1 and 2

c) 2 and 2

d) 2 and 1

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