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Cambridge IGCSE Combined Science practice

Paper 3 structured question: The characteristic properties of acids and bases

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The characteristic properties of acids and bases

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Paper 3Theory (Core)1 marks

Consider the following statements about bases.

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Statements about Bases

1. Bases feel slippery. 2. Bases taste bitter. 3. Bases turn red litmus paper blue. 4. Bases produce hydrogen ions (H+) in solution.

  1. a

    Identify which statement is incorrect regarding bases.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: The characteristic properties of acids and bases

Paper 3Theory (Core)3 marks

Description

Properties of Bases

Bases are substances that can neutralize acids. They feel slippery, taste bitter, and turn red litmus paper blue. When dissolved in water, they produce hydroxide ions (OH-).

  1. a

    Explain the key properties of bases based on their reactions with acids.

    Aim for approximately 3 distinct marking points.

    [3]