refer to the following incomplete, unbalanced equation
Cr₂O₇^2-(aq) + NO(g)
Cr³⁺(aq) + NO₃^-(aq)
-How many electrons are in the half-reaction involving Cr₂O₇^2-?

Question

refer to the following incomplete, unbalanced equation Cr 2 O 7 2- (aq) + NO(g) Cr 3+ (aq) + NO 3 - (aq) -How many electrons are in the half-reaction involving Cr₂O₇^2-?

Quizplus · Accepted Answer

In the half-reaction, Cr2O7^2- is reduced to 2Cr^3+. The change in oxidation state for each Cr is from +6 to +3, which is a change of 3 per Cr atom. Since there are 2 Cr atoms, the total change is 6 electrons.

Refer to the Following Incomplete, Unbalanced Equation