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Calculate the pH of a solution that is 0.40 M H2NNH2 and 0.80 M H2NNH3NO3. In order for
Chapter 15, Problem 15.71(choose chapter or problem)
QUESTION:
Calculate the pH of a solution that is 0.40 M H2NNH2 and 0.80 M H2NNH3NO3. In order for this buffer to have pH 5 pKa, would you add HCl or NaOH? What quantity (moles) of which reagent would you add to 1.0 L of the original buffer so that the resulting solution has pH 5 pKa?
Questions & Answers
QUESTION:
Calculate the pH of a solution that is 0.40 M H2NNH2 and 0.80 M H2NNH3NO3. In order for this buffer to have pH 5 pKa, would you add HCl or NaOH? What quantity (moles) of which reagent would you add to 1.0 L of the original buffer so that the resulting solution has pH 5 pKa?
ANSWER:The pH of the solution can be found using an acid-base titration. For example, using an ICE table:
H2NNH2 + H2O H3O+ +NH3
0.40M 0 0 0.40M
H2NNH3NO3