What is the Ka of a weak acid (HA) if the initial concentration of weak acid is 0.55 M and the pH is 2.74? A)2.1 × 10^-4 B)5.9 × 10^-8 C)1.5 × 10^-10 D)6.0 × 10^-6 E)7.4 × 10^-9
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Step 1
First, we need to find the concentration of H+ ions from the pH. The pH is the negative logarithm of the H+ concentration. So, we can find the H+ concentration by taking the antilog of the negative pH. H+ = 10^-pH = 10^-2.74 = 1.82 x 10^-3 M Show more…
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