Grade 12Inorganic Chemistry
When given a compond how do you know its colour?
When given a compond how do you know its colour?
3 Answers
Amitabh Shrivastava
Approved Tutor Answer15 Years agoIt is not possible to find the colour of a compound simply by looking at its molecular formula. SUCH QUESTIONS CAN OLY BE ANSWERED ON THE BASIS OF ELIMINATION OF OPTIONS OR MEMORY. For examle a low spin complex is likely to be red as it absorbs high energy blue end of spectrum.I understand this may be a little confusing so feel free to contact for any queries.
Do not forget to aapprove this answer
sushant singh
Approved Tutor Answer15 Years agoHii madhu....
well to understand the compound by mere look is some what an experience that comes with experiments ...
Appearance of compound details
The compound will most likely be in solid form. Note the color and shape of the crystals. Ionic compounds formed from the representative elements tend to be white or colorless, while ions of transition elements tend to be colored. The following is a table of the colors of metal ions in solution with NO3-.
| Ion | Color |
|---|---|
| Co2+ | rose |
| Co3+ | violet |
| Cr3+ | violet |
| Cu2+ | blue |
| Fe2+ | pale green, pale violet |
| Fe3+ | yellow-brown |
| Mn2+ | pale pink |
| Ni2+ | blue-green |
If you check this table i think you will next time identify the compound by just looking at it ....or atleast you will b able to know the cation involve ...
Amitabh Shrivastava
It is not possible to find the colour of a compound simply by looking at its molecular formula. SUCH QUESTIONS CAN OLY BE ANSWERED ON THE BASIS OF ELIMINATION OF OPTIONS OR MEMORY. For examle a low spin complex is likely to be red as it absorbs high energy blue end of spectrum.I understand this may be a little confusing so feel free to contact for any queries.
Do not forget to aprove this answer
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