Question

Consider the following equations.

Fe2+(aq)   + Pt4+(aq) → Fe3+(aq)   + Pt2+(aq)     (1)

Fe2+(aq)   + 2Pt4+(aq)→ Fe3+(aq)   + 2Pt2+(aq)   (2)

2Fe2+(aq) + Pt4+(aq) → 2Fe3+(aq) + Pt2+(aq)     (3)

Fe2+(aq)   + 2Pt4+(aq)→ 2Fe3+(aq) + 2Pt2+(aq)   (4)

2Fe3+(aq) + Pt2+(aq) → 2Fe2+(aq) + Pt4+(aq)     (5)

Indicate the letter which answers the question: Which equation is balanced?

Only equation 1

Only equation 2

Only equation 3

Only equation 4

Only equation 5

All are balanced

None is balanced

Cannot be determined

None of the above

Justify your choice in Part a.

Answer 1

answer : None of the above

because equation 3 and 5 both are balanced . so this option is not given here

Fe2+(aq)   + Pt4+(aq) → Fe3+(aq)   + Pt2+(aq)     (1)

not balanced . because overall charge on left = +6 and overall charge on right = +5

Fe2+(aq)   + 2Pt4+(aq)→ Fe3+(aq)   + 2Pt2+(aq)   (2)

not balanced because overall charge on left = +10 and overall charge on right = +7

2Fe2+(aq) + Pt4+(aq) → 2Fe3+(aq) + Pt2+(aq)     (3)

balanced  balanced because overall charge on left = +8 and overall charge on right = +8

Fe2+(aq)   + 2Pt4+(aq)→ 2Fe3+(aq) + 2Pt2+(aq)   (4)

not balanced because Fe are not equal on both sides

2Fe3+(aq) + Pt2+(aq) → 2Fe2+(aq) + Pt4+(aq)     (5)

balanced