Cambridge IGCSE Chemistry practice

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

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Paper

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Topic

The characteristic properties of acids and bases

Exam-style question

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Paper 3Theory (Core)1 marks

Indicators are used in various chemical experiments to determine the pH of solutions.

Description

Indicators such as litmus, thymolphthalein, and methyl orange are commonly used to test for acidity.

a
State the color change of litmus in an acidic solution.
Your answer
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[1]

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Paper 3Theory (Core)2 marks

Description

Describe the color changes of thymolphthalein and methyl orange in acidic solutions.

a
Describe the color of thymolphthalein and methyl orange in acidic solutions.
Your answer
Aim for approximately 2 distinct marking points.
[2]