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4.1 Predicting chemical reactions

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Question 23
H

Astatine, At, is below iodine in Group 7.

Chlorine water is added to a solution of potassium astatide, KAt\mathrm{KAt}KAt.

Which ionic equation is the best prediction for what happens?

[1]
A

At2+2Cl−→2At−+Cl2\mathrm{At_{2} + 2Cl^{-} \rightarrow 2At^{-} + Cl_{2}}At2​+2Cl−→2At−+Cl2​

B

Cl2+2At−→2Cl−+At2\mathrm{Cl_{2} + 2At^{-} \rightarrow 2Cl^{-} + At_{2}}Cl2​+2At−→2Cl−+At2​

C

Cl2+At−→Cl−+At2\mathrm{Cl_{2} + At^{-} \rightarrow Cl^{-} + At_{2}}Cl2​+At−→Cl−+At2​

D

Cl2+2K+→2KCl\mathrm{Cl_{2} + 2K^{+} \rightarrow 2KCl}Cl2​+2K+→2KCl

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4.1 Predicting chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /4.1 Predicting chemical reactions

113 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.

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