Multiple Choice
A weak acid has Ka = 4.2 × 10-3. If [A-] = 2.0 M, what must [HA] be so that [H+] = 2.1 × 10-3 M?
A) 1.5 M
B) 2.0 M
C) 1.0 M
D) 0.5 M
E) 0.25 M
Correct Answer:
Verified
Correct Answer:
Verified
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