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Acids, bases and buffers

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Question 5

A buffer solution is prepared by mixing 150 cm3 of 0.40 mol dm-3 propanoic acid, CH3CH2COOH\text{CH}_3\text{CH}_2\text{COOH}CH3​CH2​COOH, with 250 cm3 of 0.30 mol dm-3 sodium propanoate, CH3CH2COONa\text{CH}_3\text{CH}_2\text{COONa}CH3​CH2​COONa. Given that Ka K_a\,Ka​ for propanoic acid is 1.35 × 10-5 mol dm-3 at this temperature, what is the pH of the resulting buffer solution?

4.744.744.74

4.774.774.77

4.874.874.87

4.974.974.97

Acids, bases and buffers Questions

  1. A Level
  2. /Chemistry
  3. /Acids, bases and buffers