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3.3 Types of chemical reactions

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Question 24

Acidic wastewater at a treatment plant contains sulfuric acid, H2SO4\text{H}_2\text{SO}_4H2​SO4​. The acid must be neutralised without producing a gas. A technician considers two solids.

SolidNameFormulaType
Acalcium hydroxideCa(OH)2\text{Ca(OH)}_2Ca(OH)2​metal hydroxide
Bcalcium carbonateCaCO3\text{CaCO}_3CaCO3​metal carbonate
a.

Explain which solid the technician should use.

[2]
b.

Give a balanced symbol equation for the reaction of the chosen solid with sulfuric acid.

[2]
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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