Which of the following weak acids would have the smallest $pK_a$? Acid (a): $H_2S$ Acid (b): $H_3P$ Because these are in/with , the greater the , the weaker the bond to H. The acid with the smallest $pK_a$ will be the with the which is
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The $pK_a$ is related to the acid dissociation constant ($K_a$), where $pK_a = -\log_{10} K_a$. A smaller $pK_a$ indicates a stronger acid. Show more…
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