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1.1 Formulae, equations and hazards

1.1 Formulae, equations and hazards

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Question 15

Aluminum sulfate is widely used in water treatment facilities as a coagulant to clump microscopic impurities together for easier filtration. Based on the stable ions formed by its constituent elements and polyatomic groups, what is the correct chemical formula of aluminum sulfate?

A

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

B

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

C

AlSO4\text{AlSO}_4AlSO4​

D

Al(SO4)2\text{Al}(\text{SO}_4)_2Al(SO4​)2​

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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