Answer to Question #260777 in Chemistry for Harpreet

Question #260777

Balance the following half-reaction in an acidic solution: (4 marks) Cr2 O7 2- → Cr3

Expert's answer

Solution:

Balanced half-reaction:

Cr₂O₇^2- + 14H⁺+ 6е- → 2Cr³⁺ + 7H₂O

or

Cr₂O₇^2-(aq) + 14H⁺(aq)+ 6е- → 2Cr³⁺(aq) + 7H₂O(l)

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