Consider the cell Pt(s) mid H_2(g) (1 atm) mid H^+(aq, [H^+]=1) ∥ Fe^3+(aq), Fe^2+(aq) mid Pt(s) Given E°_Fe^3+/Fe^2+ = 0.771 V and E°_H^+/1/2H_2 = 0 V, T = 298 K If the potential of the cell is 0.712 V, the ratio of concentration of Fe^2+ to Fe^3+ is ________ (Nearest integer)

Consider the cell Pt(s) mid H_2(g) (1 atm) mid H^+(aq,… — JEE Main 2023 Chemistry PYQ

JEE Main 2023 · 25 Jan · Shift 1 · numerical answer

Consider the cell

\text{Pt}(s) \mid \text{H}_2(g)\ (1\ \text{atm}) \mid \text{H}^+(aq,\ [\text{H}^+]=1) \parallel \text{Fe}^{3+}(aq),\ \text{Fe}^{2+}(aq) \mid \text{Pt}(s)

Given

E^\circ_{\text{Fe}^{3+}/\text{Fe}^{2+}} = 0.771\ \text{V}

and

E^\circ_{\text{H}^+/\frac{1}{2}\text{H}_2} = 0\ \text{V}

T = 298\ \text{K}

If the potential of the cell is

0.712\ \text{V}

, the ratio of concentration of

\text{Fe}^{2+}

\text{Fe}^{3+}

is ________ (Nearest integer)

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Answer: 10

[JEE Main 2023 · 25 Jan · Shift 1]

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