(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I am trying to prepare a 1L Tris-HCl buffer 1M pH7. The pKa value is 8.06. The question is, how many molar of HCl should be added to produce this buffer?

2. Relevant equations

pH = pKa + log [base/acid]

3. The attempt at a solution

7=8.06 + lg (a/b)

-1.06=lg (a/b)

a/b = 0.0871 -----1

a+b= 1M

a=1-b --------2

Hence,

(1-b)/b = 0.0871

b = 0.92M

a = 0.08M

So, the molarity of HCl to be added is 0.92M or 0.08M. Why?

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# Homework Help: Henderson Hassalbach equation problem

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