Question

When potassium dichromate crystal is heated with conc.Hcl?

Answer 1

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14HCl + K2Cr2O7 3Cl2 + 2CrCl3 + 2KCl + 7H2O.

Hydrogen chloride react with potassium dichromate to produce chlorine, chromium(III) chloride, potassium chloride and water. Hydrogen chloride - concentrated solution.

This reaction takes place at a temperature of 60-80°C. Laboratory method receiving of chlorinE

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