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1.1 Formulae, equations and hazards

1.1 Formulae, equations and hazards

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Question 24

Aluminium sulfate is widely used in municipal water treatment as a coagulant to assist in the removal of suspended impurities. It is prepared by reacting solid aluminium hydroxide with dilute sulfuric acid:

aluminium hydroxide+sulfuric acid→aluminium sulfate+water \text{aluminium hydroxide} + \text{sulfuric acid} \rightarrow \text{aluminium sulfate} + \text{water} aluminium hydroxide+sulfuric acid→aluminium sulfate+water

Which of the following is the correct chemical formula for aluminium sulfate?

A

Al3(SO4)2\text{Al}_3(\text{SO}_4)_2Al3​(SO4​)2​

B

Al2SO4\text{Al}_2\text{SO}_4Al2​SO4​

C

Al2(SO4)3\text{Al}_2(\text{SO}_4)_3Al2​(SO4​)3​

D

Al(SO4)3\text{Al}(\text{SO}_4)_3Al(SO4​)3​

Markscheme

1.1 Formulae, equations and hazards Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 Formulae, equations and hazards

230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.

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