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1 markNon-Metals

CSEC Chemistry · January 2005 · Paper 2 · Question 5(a)(iii)

Dilute hydrochloric acid is added to separate samples of solid sodium sulphite and sodium carbonate. The gases produced are subjected to tests (i), (ii), (iii), and (iv) in Table 2.

State ONE effect that the products from these two reactions could have on the environment.

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Other parts of this question

  1. 5(a)(i)Write balanced equations for the reactions between hydrochloric acid and sodium sulphite.[2 marks]
  2. 5(a)(ii)Write balanced equations for the reactions between hydrochloric acid and sodium carbonate.[2 marks]
  3. 5(b)(i)Describe the observations expected from tests (i) – (iv) in Table 2. Observations from: (i) Acidified potassium manganate (VII) with gas from sodium sulphite.[4 marks]
  4. 5(b)(ii)Describe the observations expected from tests (i) – (iv) in Table 2. Observations from: (ii) Aqueous calcium hydroxide with gas from sodium carbonate.[4 marks]
  5. 5(b)(iii)Describe the observations expected from tests (i) – (iv) in Table 2. Observations from: (iii) Damp blue litmus with gas from sodium sulphite.[4 marks]
  6. 5(b)(iv)Describe the observations expected from tests (i) – (iv) in Table 2. Observations from: (iv) Damp blue litmus with gas from sodium carbonate.[4 marks]
  7. 5(c)With reference to the gas produced when hydrochloric acid reacts with sodium sulphite, account for the observed changes in the acidified potassium manganate…[3 marks]
  8. 5(d)Draw a diagram of the apparatus to show how the products formed from observation (b) (ii) could be separated.[3 marks]

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