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18 Nov 2019

a) A buffer solution contains 0.455 M NaHSO3 and 0.254 M K2SO3. Determine the pH change when 0.096 mol NaOH is added to 1.00 L of the buffer.

pH after addition − pH before addition = pH change = ___________

b) Determine the pH change when 0.131 mol KOH is added to 1.00 L of a buffer solution that is 0.460 M in CH3COOH and 0.280 M in CH3COO-.

pH after addition − pH before addition = pH change = ___________

c) When a 25.0 mL sample of a 0.369 M aqueous acetic acid solution is titrated with a 0.311 M aqueous sodium hydroxide solution, what is the pH at the midpoint in the titration?
pH = _________

d) A 17.3 mL sample of a 0.427 M aqueous hypochlorous acid solution is titrated with a 0.441 M aqueous potassium hydroxide solution. What is the pH at the start of the titration, before any potassium hydroxide has been added?

pH = __________

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Elin Hessel
Elin HesselLv2
18 Jul 2019

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