the equilibrium constant, Keq for the following acid/base reaction is 10 -11.3 .

Question

the equilibrium constant, Keq for the following acid/base reaction is 10-11.3. What is the pKa of HN3?

Please provide the formula!

I know Keq= [products]/[reactants] and pKa= -logKa, but I dont know how to find specifically for NH3. I also know that NH3 is a base so it will have a high pKa

the equilibrium constant, Keq for the following acid/base reaction is 10-11.3. What is the pKa of HN3? Please provide the formula! I know Keq= [products]/[reactants] and pKa= -logKa, but I dont know how to find specifically for NH3. I also know that NH3 is a base so it will have a high pKa

Explanation / Answer

PKa = - log [(H3CCH20-)+HN3/N-

PKa for HN3 would come around 4.3

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