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Transition elements

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Question 4

A student adds an excess of concentrated hydrochloric acid to a test tube containing a pale blue aqueous solution of copper(II) sulfate. The solution changes color to form a yellow-green solution.

Which complex ion is responsible for this yellow-green color?

A

[CuCl6]4−[\text{Cu}\text{Cl}_6]^{4-}[CuCl6​]4−

B

[Cu(H2O)4Cl2][\text{Cu}(\text{H}_2\text{O})_4\text{Cl}_2][Cu(H2​O)4​Cl2​]

C

[CuCl4]2−[\text{Cu}\text{Cl}_4]^{2-}[CuCl4​]2−

D

[CuCl4]2+[\text{Cu}\text{Cl}_4]^{2+}[CuCl4​]2+

Markscheme

Transition elements Questions

  1. A Level
  2. /Chemistry
  3. /Transition elements

48 exam-style questions on OCR A A Level Chemistry Transition elements. Each one has a worked solution and a mark scheme showing where the marks go.

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