Transition Element

Question 1

What are the common properties of the transition metals?

Answer 1

1. They form compounds in which the transition elements have different oxidation states
2. Form coloured compounds
3. Elements and their compounds can act as catalysts
4. Can form complex ions

Question 2

What is the formation of coloured compounds?

Answer 2

• Potassium dichromate (VI) - bright orange
• Cobalt (II) chloride - pink-purple
• Nickel (II) sulfate - green
• Hydrated copper (II) sulfate - blue
• common chromium oxidation states:
  
  • Cr(III) - green
  • Cr(VI) - yellow/orange
• two coloured Fe oxidation states
  
  • Iron(II) - pale green
  • Iron(III) - yellow