Last modified: Wed 12/31/1969 06:00:00 pm
BCE

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.

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1a. Calculate the pH of a 500 mLs solution containing 0.250 M NH3 and 0.300 M NH4NO3. Kb for NH3 is 1.8 x 10-5.

pH =

b) Calculate the moles of NH3 and NH4+ in the solution.

moles of NH3 = moles

moles of NH4+ = moles

c) 0.00500 moles of HCl are added to the solution in Q1. After the addition, calculate the moles of NH3 and NH4+ in the solution.

moles of NH3 = moles

moles of NH4+ = moles

d) Calculate the pH of the solution after the addition of the 0.00500 moles of HCl.

pH =

e) Calculate the pH after adding 0.125 moles of HCl to the solution in Q1.

pH =

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3. If there is one question you would like to have answered in lecture, what would that question be?