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CAIE A-Level Chemistry AS 10.1.2 Reactions of the Oxides Hydroxides Questions

Practise equations and observations for Group 2 oxides, hydroxides and carbonates with water and dilute acids.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • write oxide or hydroxide neutralisation equations forming a Group 2 salt and water
  • write carbonate–acid equations forming the salt, water and CO2 and state the effervescence
  • use solubility and disappearance of a white solid to distinguish oxide, hydroxide or carbonate reactions

CAIE A-Level Chemistry AS 10.1.2 Reactions of the Oxides Hydroxides Questions question 1

[Maximum number: 1]

Dolomite is a double carbonate, CaMg(CO3)2\mathrm{CaMg}\left(\mathrm{CO}_{3}\right)_{2}, and can be used instead of calcium carbonate for treating acidic soils.

The three statements all refer to the agricultural use of these carbonates.
1 Dolomite and calcium carbonate are both less soluble than Ca(OH)2\mathrm{Ca}(\mathrm{OH})_{2}.
2 One mole of dolomite has the same neutralising effect as one mole of calcium carbonate.

3 Dolomite and calcium carbonate both increase the pH of acidic soils.
Which statements are correct?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

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