A Weak Monoprotic Acid Is Dissolved in Water

Multiple Choice

A weak monoprotic acid is dissolved in water. A solution that is 0.10 M is found to be 1.2% ionized. Calculate K _a for the acid.

A) 1.4×10 ^{- 5}
B) 1.2×10 ^{- 3}
C) 1.1×10 ^{- 2}
D) 0.12
E) 12