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2 marksAcid/Base Equilibria

CAPE Chemistry Unit 1 · 2005 · Paper 1 · Question 6(a)(iii)

The pKa values of ethanoic acid and ethanol are 4.76 and 15.9 respectively.

Describe the features of EACH of the organic molecules that account for the difference in pKa values.

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Other parts of this question

  1. 6(a)(i)State the meaning of the term pKa.[1 mark]
  2. 6(a)(ii)Explain the significance of the given pKa values.[2 marks]
  3. 6(b)(i)Give the displayed formula of L-threonine in an acidic solution.[2 marks]
  4. 6(b)(ii)Explain why L-threonine has a high melting point and is soluble in water.[3 marks]

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