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1.1 Formulae, equations and hazards

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Question 10
H

Astatine is the element below iodine in Group 7. Bromine water is added to a solution of sodium astatide, NaAt\mathrm{NaAt}NaAt.

Which is the balanced ionic equation for the reaction that takes place?

[1]
A

Br2+2At−→2Br−+At2\mathrm{Br_{2}} + 2\mathrm{At^{-}} \rightarrow 2\mathrm{Br^{-}} + \mathrm{At_{2}}Br2​+2At−→2Br−+At2​

B

At2+2Br−→2At−+Br2\mathrm{At_{2}} + 2\mathrm{Br^{-}} \rightarrow 2\mathrm{At^{-}} + \mathrm{Br_{2}}At2​+2Br−→2At−+Br2​

C

Br2+2At−→2Br−+2At\mathrm{Br_{2}} + 2\mathrm{At^{-}} \rightarrow 2\mathrm{Br^{-}} + 2\mathrm{At}Br2​+2At−→2Br−+2At

D

Br2+At−→Br−+At2\mathrm{Br_{2}} + \mathrm{At^{-}} \rightarrow \mathrm{Br^{-}} + \mathrm{At_{2}}Br2​+At−→Br−+At2​

Markscheme

1.1 Formulae, equations and hazards Questions

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

47 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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