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You have 1 liter of 0.1M TRIS buffer at pH = 8. The pKa for TRIS is 8.08. How much 10M HCl would you need

You have 1 liter of 0.1M TRIS buffer at pH = 8. The pKa for TRIS is 8.08. How much 10M HCl would you need to make this buffer pH at 7.0? Do not concern yourself with dilution effects.

a. 2 ml

b. 4 ml

c. 8 ml

d. 10 ml

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