What is the effect of heat and pH on K2Cr2O7 ?
Answer (1)
20th Mar, 2020
Hello Student ,
Heat and pH have the following effects on Potassium Dichromate
Effect of Heat on K2Cr2O7 (Oxidation State of Cr remains constant)
4K2Cr2O7 ----Heat----> 4K2CrO4 + 2Cr2O3 + 3O2
Effect of pH on K2Cr2O7 (Oxidation State of Cr Remains Constant)
- Cr2O7^ 2- + H2O ---pH = 8----> CrO4^ 2- + 2H+
- CrO4^ 2- + 2H+ ---pH = 4----> Cr2O7^ 2- + H2O
Please note the Oxidation number of Cr is constant in both the cases .
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