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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Formulae

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Formulae

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Paper 4Theory (Extended)1 marks

Calculating the formula from ion charges.

Description

Ionic Compound Charges

A compound is formed from aluminum ions (Al^3+) and oxide ions (O^2-). Determine the formula of the compound.

  1. a

    Determine the formula of the compound formed from aluminum and oxide ions.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Formulae

Paper 4Theory (Extended)1 marks

Description

Ionic Compound Formation

A compound is formed from sodium ions (Na^+) and sulfate ions (SO4^2-). Determine the formula of the compound.

  1. a

    State the formula of the compound formed from sodium and sulfate ions.

    Aim for approximately 1 distinct marking point.

    [1]