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CAIE A-Level Chemistry AS 10.1.5 Variation in the Solubilities Questions

Practise recalling and applying the opposite solubility trends of Group 2 hydroxides and sulfates down the group.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • state that Group 2 hydroxide solubility increases from magnesium to barium down the group
  • state that Group 2 sulfate solubility decreases down the group from magnesium to barium
  • use both trends together to rank compounds, identify an ion or predict precipitation behaviour

CAIE A-Level Chemistry AS 10.1.5 Variation in the Solubilities Questions question 1

[Maximum number: 1]

All solubility data in this question is given at the same temperature.
The table gives some data for compounds of calcium and for compounds of X, an unidentified element in Group 2.

Table for Question CAIE A-Level Chemistry AS 10.1.5 Variation in the Solubilities Questions question 1 — CAIE A-Level Chemistry AS

What is the missing data for element X ?

solubility of sulfate /mol/ \mathrm{mol} per 100 g of water

solubility of hydroxide /mol/ \mathrm{mol} per 100 g of water

7.11×10−57.11 \times 10^{-5}

2.00×10−52.00 \times 10^{-5}

7.11×10−57.11 \times 10^{-5}

3.37×10−33.37 \times 10^{-3}

1.83×10−11.83 \times 10^{-1}

2.00×10−52.00 \times 10^{-5}

1.83×10−11.83 \times 10^{-1}

3.37×10−33.37 \times 10^{-3}

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