How do you calculate a Ka value from pKa?

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How do you calculate a Ka value from pKa?

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Answer 1 · 2016-02-02T19:53:39

$p K_{a}$ $pK_a$ $=$ $=$ $- {log}_{10} K_{a}$ $-log_10K_a$ . Thus $K_{a}$ $K_a$ $=$ $=$ $10_{a}^{- p K_{a}}$ $10^(-pK_a)$

Explanation:

Remember your definitions for logarithmic functions. When we write ${log}_{a} b = c$ $log_ab = c$ , we specify that $a^{c} = b$ $a^c =b$ . For example ${log}_{10} 100 = 2$ $log_(10)100 = 2$ , and ${log}_{10} 1000 = 3$ $log_(10)1000 = 3$ . It follows that exceptionally strong acids have NEGATIVE $p K_{a}'s$ $pK_a"'s"$ .

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How do you calculate a Ka value from pKa?

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