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Determine the formula of an ionic compound based on the relative quantities of ions depicted in a model or diagram, or from the charges of the ions.

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Cambridge IGCSE Combined ScienceStoichiometrySupplement content

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Determine the formula of an ionic compound based on the relative quantities of ions depicted in a model or diagram, or from the charges of the ions

  • This point belongs to Formulas, especially Formulas outcomes.
  • You need to be able to determine the formula of an ionic compound based on the relative quantities of ions depicted in a model or diagram, or from the charges of the ions.
  • The key ideas to know are Deduce.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

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Deduce

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Paper 4 structured question: Formulas

Paper 4Theory (Extended)1 marks

Description

Ionic Compound Analysis

You are given the following ions: Calcium (Ca^2+) and Chloride (Cl^-). Determine the formula for the ionic compound formed from these ions.

  1. a

    Determine the formula of the ionic compound formed from calcium and chloride ions.

    Aim for approximately 1 distinct marking point.

    [1]
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