Which pair of ions is colourless ?Fe+3, Zn+2Zn+2, Mn+4Zn+2, Ti+4Cu+, Cr+3
Question
Which pair of ions is colourless ?Fe+3, Zn+2Zn+2, Mn+4Zn+2, Ti+4Cu+, Cr+3
Solution
The pair of ions that is colorless is Zn+2, Ti+4.
Here's why:
- Fe+3 ions are typically yellow-brown.
- Zn+2 ions are colorless.
- Mn+4 ions are typically brown or black.
- Ti+4 ions are colorless.
- Cu+ ions are typically blue or green.
- Cr+3 ions are typically green or violet.
So, the only pair that both have colorless ions is Zn+2, Ti+4.
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