Question

Indicate whether each of the following describes an oxidation or reduction
a. O2(g) +4e --> 2O-2(ag)
b. Al(s) --> Al+3(ag) +3e
c. 2Br(ag) --> Br2(l) +2e
d. Cr+3(ag) + 3e --> Cr(s)

Answer 1

Leo says Ger.
Lose electrons -> oxidation
Gain electrons -> reduction

Answer 2

Any ideas now?

Answer 3

a. Oxidation
b. Reduction
C. Reduction
D. Oxidation

Answer 4

Good effort, but it is the exact opposite of what you said. For example, in part a, oxygen is gaining electrons from the left to the right. So that is reduction.

Answer 5

oh wow. I get it thank you.

Answer 6

No worries. :)