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Question

BALANCE THE FOLLOWING CHEMICAL REACTION :

CrO5 +H2 SO4 ------ Cr2 (SO4)3 + H2O +O2

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Solution

Balanced equation is:
4CrO5 + 6H2SO4 → 2Cr2(SO4)3 + 6H2O + 7O2
Balancing steps:

4Cr​6+ + 12 e + 12H+ + H2O → 4Cr3+ + 7H2O + 2O2
4CrO5 + 12 e + 12H+ + H2O → 4Cr3+ + 7H2O + 7O2
4CrO5 + 6H2SO4 + H2O →​2Cr(SO4)3+ 7H2O + 7O2
Hence ,
4CrO5 + 6H2SO4 →2Cr2(SO4)3 + 6H2O + 7O2



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