Group 2 hydroxides are all white solids. The solubility of Group 2 hydroxides increases down the group.Magnesium hydroxide is almost insoluble in water and is sold as a suspension in water rather than a solution.Calcium hydroxide is sparingly soluble and a solution of calcium hydroxide is called limewater. Limewater is used to test for carbon dioxide.Strontium hydroxide is more soluble and barium hydroxide is much more soluble with a pH of about 13.
Solubility of Hydroxides
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Specification: AQA Chemistry (7404), AS-level, 3.2.2 Group 2, the alkaline earth metals. Topic: Group 2.
Key terms in this lesson
- Group
- A vertical column of the periodic table, containing elements with the same number of outer-shell electrons.
More in Group 2
- Group 2 Elements
- Physical Properties
- Ionisation Energies
- Calcium
- Reaction with Water
- Solubility of Sulfates
All 7 lessons in Group 2 · All AQA AS-level Chemistry topics