Match the transition metal ion to its aqueous colour

Exercise and reference answers

Matching pairs

1. Left

   Cu²⁺ (aq)

   Right

   Blue

2. Left

   Fe²⁺ (aq)

   Right

   Pale green

3. Left

   Fe³⁺ (aq)

   Right

   Yellow-brown

4. Left

   Cr³⁺ (aq)

   Right

   Violet

5. Left

   MnO₄⁻ (aq)

   Right

   Purple