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Edexcel A-Level Chemistry A2 17.20 Understand in Terms of the Relevant E Values That the Dichromate Vi Ion Cr2o2 I Can Be Reduced to Cr3 and Cr2 Ions Questions

Use E values and oxidation-number changes to decide whether chromium species are oxidised or reduced, then connect the product to its colour and balanced equation.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
A2

Exam points

  • Use E values to decide whether Cr3+ is oxidised to dichromate or chromate.
  • Identify chromium colours such as orange dichromate, yellow chromate and green Cr3+.
  • Write balanced chromium redox equations from Data Booklet half-equations.

Edexcel A-Level Chemistry A2 17.20 Understand in Terms of the Relevant E Values That the Dichromate Vi Ion Cr2o2 I Can Be Reduced to Cr3 and Cr2 Ions Questions question 1

[Maximum number: 1]

This question is about cell reactions involving chromium.
Use your Data Booklet when answering this question.

State the essential condition required for these reactions to occur.

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