Question

Balance the following half-reaction: (acidic) VO2+(aq) → V3+(aq) Express your answer as a half-reaction. Identify all of the phases in your answer. nothing

Answer 1

Answer:

The balanced half reaction in an acidic medium is :

$VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)$

Explanation:

$VO^{2+}(aq)\rightarrow V^{3+}(aq)$

While balancing the half-reaction in  an acidic medium, we will first balance oxygen atoms by adding water:

1) Adding 1 water molecule on product side to balance oxygen atoms.

$VO^{2+}(aq)\rightarrow V^{3+}(aq)+H_2O(l)$

Now balance hydrogen atom by adding $H^+ ions$.

2) Adding 2 hydrogen ions on reactant side to balance hydrogen atoms.

$VO^{2+}(aq)+2H^+(aq)\rightarrow V^{3+}(aq)+H_2O(l)$

Now balance the charge adding electrons on the side where positive charge is mor.

3) Adding 1 electrons on reactant side to balance charge of the overall reaction:

$VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)$

The balanced half reaction in an acidic medium is :

$VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)$