In acidic solution

CHEMISTRY · Single correct · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions

Problem

In acidic solution,

\mathrm{Cr_2O_7^{2-}}

reacts with

\mathrm{Fe^{2+}}

to produce

\mathrm{Cr^{3+}}

and

\mathrm{Fe^{3+}}

. What is the coefficient of

\mathrm{Fe^{2+}}

when the overall equation is balanced using the smallest whole-number coefficients? (a)

4

(b)

6

(c)

3

(d)

5