I think these I know how to do ....just want someone to check..still sorta mixed up on the first question. Thanx

Question

For the following reaction, what is the correctly balanced reduction half-reaction?
Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + OH-(aq)

A. e- + Fe(OH)3(s) → Fe(s) + OH-(aq)
B. 3 e- + Fe(OH)3(s) → Fe(s) + 3 OH-(aq)
C. Fe(OH)3(s) → Fe(s) + 3 OH-(aq) + 3 e-
D. Cu(s) → Cu+(aq) + e-
I think answer is C

For the following reaction, what is the correctly balanced overall reaction?
Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + OH-(aq)

A. Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + 3 OH-(aq)
B. Fe(OH)3(s) + 2 Cu(s) → Fe(s) + 2 Cu+(aq) + OH-(aq)
C. Fe(OH)3(s) + 3 Cu(s) → Fe(s) + 3 Cu+(aq) + 3 OH-(aq)
D. 3 Fe(OH)3(s) + Cu(s) → 3 Fe(s) + Cu+(aq) + 9 OH-(aq)

i thnk answer is A

if either is wrong can sum1 explain why? thanx

Answer 1

For the following reaction, what is the correctly balanced reduction half-reaction?
Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + OH-(aq)

To be reduced the electrons must be added which means on the left.

A. e- + Fe(OH)3(s) → Fe(s) + OH-(aq)
A can't be right because OH^- doesn't balance.

B. 3 e- + Fe(OH)3(s) → Fe(s) + 3 OH-(aq)

C. Fe(OH)3(s) → Fe(s) + 3 OH-(aq) + 3 e-
C can't be right because the electrons are on the right AND because the charge doesn't balance (zero on left and -6 on right).

D. Cu(s) → Cu+(aq) + e-
D can't be right because the electrons are on the right side
I think answer is C

Answer 2

For the following reaction, what is the correctly balanced overall reaction?
Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + OH-(aq)

A. Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + 3 OH-(aq)
A can't be right because the charge doesn't balance (zero on left and -2 on right--also the exchange of electrons is not the same).

B. Fe(OH)3(s) + 2 Cu(s) → Fe(s) + 2 Cu+(aq) + OH-(aq)
B can't be right because the charge doesn't balance and OH doesn't balance and electron transfer doesn't balance.

C. Fe(OH)3(s) + 3 Cu(s) → Fe(s) + 3 Cu+(aq) + 3 OH-(aq)
D. 3 Fe(OH)3(s) + Cu(s) → 3 Fe(s) + Cu+(aq) + 9 OH-(aq)
D can't be right because charge doesn't balance and because electron transfer doesn't balance.

i thnk answer is A