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Learning objective

Link Group 2 solubility trends to applications.

Read the explanation, check the common trap, then practise with flashcards and questions.

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Topic

Group 2, the alkaline earth metals

Subtopic

Group 2 applications

Aqa A Level ChemistryInorganic chemistry

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Quick explanation

Link Group 2 solubility trends to applications

  • This point belongs to Group 2, the alkaline earth metals, especially Group 2 applications.
  • You need to be able to link Group 2 solubility trends to applications.
  • The key ideas to know are trends, group, and link.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

trendsgrouplinkapplicationssolubility

Why it matters

This objective helps connect Group 2 applications to exam-style questions, flashcards, and revision notes for Group 2, the alkaline earth metals.

Quick student answer

Which of the following Group 2 hydroxides is the least soluble in water?

Direct answer

A) Magnesium hydroxide

Key terms

  • Lattice energy: The energy required to separate one mole of a solid ionic compound into its gaseous ions.
  • Hydroxide solubility: The ability of hydroxides of Group 2 metals to dissolve in water, increasing down the group.

Common trap

Confusing solubility with reactivity: Remember that solubility refers to how much of a substance can dissolve in water, while reactivity refers to how readily a substance reacts with another.

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