Answer
The intermediate is on the right of the image:
Work Step by Step
1. Analyze the arrows.
First arrow (Left):
- Tail: It is taking a pair of electrons from an oxygen...
- Head: to make a bond with a hydrogen.
Second arrow (Right):
- Tail: It is breaking the "H-O" bond...
- Head: to give the 2 electrons to the oxygen.
2. Now, let's find the formal charges:
The left oxygen had (-1) charge, then it lost 2 electrons (+2), and formed a bond (-1) = (0) Neutral formal charge.
The other oxygen had neutral charge, then it lost 1 bond (+1), and gained 2 electrons (-2) = (-1) formal charge.
