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3.3 Types of chemical reactions

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Question 16

A school keeps a stock solution of nitric acid with a pH of 1. Nitric acid is fully ionised in water.

For a class practical, nitric acid with a pH of 4 is needed. It is made by adding only water to some of the stock solution.

By what factor must the stock solution be diluted?

[1]
A

3 times

B

30 times

C

100 times

D

1000 times

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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