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

Name: 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
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The Answer of 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

A Weak Acid Has Ka = 4