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3.3 Types of chemical reactions

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Question 19
H

Solution P has a pH of 3.

Solution Q has a concentration of H+\mathrm{H^{+}}H+ ions 100 times lower than solution P.

Solution R has a concentration of H+\mathrm{H^{+}}H+ ions 10 times higher than solution P.

What are the pH values of solutions Q and R?

[1]
A

Q has a pH of 1 and R has a pH of 4.

B

Q has a pH of 5 and R has a pH of 2.

C

Q has a pH of 5 and R has a pH of 4.

D

Q has a pH of 1 and R has a pH of 2.

Markscheme

3.3 Types of chemical reactions Questions

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

53 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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