What is K2Cr2O7 and How is it Used?
The chemical name for the compound is potassium dichromate. The molecular mass is 294.185 g/mol. It is commonly used as an oxidizing agent.It occurs naturally in form of lopezite.It is ionic compound with cation (K2^2+) & anion (Cr2O7-). The boiling point of potassium dichromate is 500°C & melting point is 398°C .It is red-orange crystals. It is odourless, non-combustile & highly corrosive. It causes severe irritation in eye & skin .It is insoluble in alcohol & acetone. It is highly water soluble. The density of potassium dichromate is
2.676 g/cm³. It is used in volumetric analysis. It is store in a tightly closed container. Do not store near combustile materials.
Uses:
1) Dyeing & calico printing
2) Electroplating
3) Tanning
4) Production of explosives
5) To clean glassware
It acts as a catalyst when added in certain amount.
FAQ
i) Potassium dichromate is an acid or a base?
Ans: It is the dipotassium salt of dichromic acid.
ii) what are dangerous effect of K2Cr2O7?
Ans: It is carcinogen in nature which causes lung cancer
iii) what happens when K2Cr2O7 is reacted with a base?
Ans: K2Cr2O7 + 2KOH →2K2CrO4 + H2O
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