At 298 K,the emf of the cell is .......... V | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The cell reaction is:Anode: $H_{2(2 \ atm)} \rightarrow 2H^{+}_{(0.002 \ M)} + 2e^{-}$Cathode: $2H^{+}_{(0.1 \ M)} + 2e^{-} \rightarrow H_{2(1 \ a

Vedclass · Accepted Answer

$0.1$

Vedclass · Answer

(C) The cell reaction is:Anode: $H_{2(2 \ atm)} ightarrow 2H^{+}_{(0.002 \ M)} + 2e^{-}$Cathode: $2H^{+}_{(0.1 \ M)} + 2e^{-} ightarrow H_{2(1 \ atm)}$Overall reaction: $H_{2(2 \ atm)} + 2H^{+}_{(0.1 \ M)} ightarrow 2H^{+}_{(0.002 \ M)} + H_{2(1 \ atm)}$Using the Nernst equation at $298 \ K$:$E_{cell} = E^{\circ}_{cell} - \frac{0.0591}{n} \log Q$Since $E^{\circ}_{cell} = 0 \ V$ for a concentration cell and $n = 2$:$Q = \frac{[H^{+}]^2_{anode} 	imes P_{H_2(cathode)}}{[H^{+}]^2_{cathode} 	imes P_{H_2(anode)}} = \frac{(0.002)^2 	imes 1}{(0.1)^2 	imes 2} = \frac{4 	imes 10^{-6}}{0.01 	imes 2} = \frac{4 	imes 10^{-6}}{0.02} = 2 	imes 10^{-4}$$E_{cell} = 0 - \frac{0.0591}{2} \log(2 	imes 10^{-4})$$E_{cell} = -0.02955 	imes (\log 2 + \log 10^{-4})$$E_{cell} = -0.02955 	imes (0.301 - 4) = -0.02955 	imes (-3.699) \approx 0.109 \ V$Given the options,the closest value is $0.1 \ V$.

At $298 \ K$,the $emf$ of the cell is .......... $V$.
$Pt | H_{2(2 \ atm)} | H^{+}_{(0.002 \ M)} || H^{+}_{(0.1 \ M)} | H_{2(1 \ atm)} | Pt$

Similar Questions

If the electric flux entering and leaving a closed surface are $\phi_1$ and $\phi_2$ respectively,then the electric charge inside the surface will be:

What are the products obtained when ammonia is reacted with excess chlorine?

Fresnel diffraction is produced due to light rays falling on a small obstacle. The intensity of light at a point on a screen beyond an obstacle depends on

Two pendulums have time periods $T$ and $5T/4$. They start $SHM$ at the same time from the mean position. After how many oscillations of the smaller pendulum will they be again in the same phase?

Which of the following statements is true regarding the industrial production of hydrogen gas from water gas $(CO + H_2)$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

At $298 \ K$,the $emf$ of the cell is .......... $V$.$Pt | H_{2(2 \ atm)} | H^{+}_{(0.002 \ M)} || H^{+}_{(0.1 \ M)} | H_{2(1 \ atm)} | Pt$