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2 marksSolubility Product

CAPE Chemistry Unit 1 · 2014 · Paper 2 · Question 5(b)(i)

At 25 °C, a saturated solution of lead(II) azide, Pb(N₃)₂, is prepared by dissolving 0.025 g in water to make 100.0 cm³ of solution.

Calculate the solubility, in mol dm⁻³, of the lead(II) azide.

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Other parts of this question

  1. 5(a)(i)Define the term 'solubility'.[2 marks]
  2. 5(a)(ii)Define the term 'solubility product'.[2 marks]
  3. 5(b)(ii)Write the expression for the solubility product of lead(II) azide.[2 marks]
  4. 5(b)(iii)Calculate the solubility product of lead(II) azide.[2 marks]
  5. 5(c)(i)Sketch a diagram showing the distribution of energies in a gas at a given temperature, T₁.[2 marks]
  6. 5(c)(ii)On the same diagram as in 5(c)(i), insert another curve showing the distribution of energies of the molecules at a higher temperature, T₂.[1 mark]
  7. 5(c)(iii)Using your sketch, explain the difference in the rates of reaction at temperatures T₁ and T₂.[2 marks]

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