Robin the Research scientist prepares 100 mLs of a solution of 100 mM of Tris HCl. What is the pH? and part two for this question

Calculate the pH when the scientist adds 100 ul of 50% NaOH

I am confused since we do not know the conjugate base concentration so how to solve for the pH

2 answers

isn't the conjugate base H2O?

i guess so? i am not to sure

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