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A Weak Acid Has Ka = 1

Question 83

Multiple Choice

A weak acid has Ka = 1.00 × 10^-3. If [HA] = 1.00 M what must be [A-] for the pH to be 2.7?

A) 0.50 M
B) 2.0 M
C) 2.7 M
D) 0.37 M
E) 0.75 M

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