Question

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Answer 1

To answer this question we have to find the value of ka, to do it, we can use the value of kb. The product of the kb of a base and the ka of its conjugated base is kw(1x10^-14):

`\begin{gathered} k_a\cdot k_b=k_w \\ k_a=(k_w)/(k_b) \\ k_a=(1*10^(-14))/(4.38*10^(-5)) \\ k_a=2.88*10^(-10) \end{gathered}`

Now, we have to use the equation of Hendersson and Hasselbach: