Question

What reduction half-reaction happens when zinc reacts with nickel(II) chloride?
Zn(s) + NiCl2(aq) ---> ZnCl2(aq) + Ni(s)

A. Ni2+(aq) + 2e− ---> Ni(s)
B. Zn(s) ---> Zn2+(aq) + 2e−
C. Ni(s) ---> Ni2+(aq) + 2e−
D. Zn2+(aq) + 2e− ---> Zn(s)

Answer 1

@nechirwan

Answer 2

which of the species is reduced?

Answer 3

B and C?

Answer 4

options B and C are both oxidation half-reactions

Answer 5

oh so A and D then

Answer 6

yeah, but as the equation is written, only one can be true

Answer 7

A is the true one?

Answer 8

yes. next time you have a question like this, assign oxidation numbers/states to all the atoms, after you do that it's obvious what the answer is

Answer 9

thank you :) @aaronq