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3.3 Types of chemical reactions

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Question 10

A museum conservator tests two solutions used on stone samples. A pH probe gives pH 3 for solution M and pH 5 for solution N.

Which statement about the ions in the two solutions is correct?

[1]
A

Solution M has the higher hydroxide ion concentration, because its pH is lower.

B

Both solutions have the same hydrogen ion concentration, because both are acidic.

C

Solution N has more hydroxide ions than hydrogen ions, because its pH is higher.

D

Solution M has the higher hydrogen ion concentration, because its pH is lower.

Markscheme

3.3 Types of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.3 Types of chemical reactions

112 exam-style questions on OCR GCSE Chemistry 3.3 Types of chemical reactions, covering 3.3.1 Oxidation and reduction in terms of oxygen, 3.3.2 Acids, alkalis and neutralisation, 3.3.3 The pH scale and measuring pH, 3.3.4 Oxidation and reduction in terms of electrons, 3.3.5 Dilute and concentrated, weak and strong acids, and 3.3.6 Hydrogen ion concentration and pH. Each one has a worked solution and a mark scheme showing where the marks go.

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