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3.3 Types of chemical reactions

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Question 43

A quality-control analyst checks a solution of nitric acid, a strong acid, used to clean metal equipment. A 2 cm32\,\mathrm{cm^{3}}2cm3 portion is made up with water to a total volume of 200 cm3200\,\mathrm{cm^{3}}200cm3. The diluted sample has a pH of 5.

What is the pH of the original nitric acid solution?

[1]
A

pH 3

B

pH 5

C

pH 7

D

pH 4

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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