Home
Class 12
CHEMISTRY
The standard reduction potentials at 298...

The standard reduction potentials at 298K for the following half cells are given :
`ZN^(2+)(aq)+ 2e^(-)Zn(s)`, `E^(@) = - 0.762V`
`Cr^(3+)(aq)+ 3e^(-) Cr(s)`, `E^(@) = - 0.740V`
`2H^(+) (aq)+2e^(-) H_(2)(g)`, `E^(@)= 0.000V`
`Fe^(3+)(aq)+ e^(-) Fe^(2+)(aq)`, `E^(@) = 0.770V`
which is the strongest reducing agent ?

A

`Zn((s))`

B

`Cr((s))`

C

`H_(2)((g))`

D

`Fe^(2+((aq))`

Text Solution

AI Generated Solution

To determine which is the strongest reducing agent among the given half-cells based on their standard reduction potentials, we can follow these steps: ### Step 1: Understand the concept of reducing agents A reducing agent is a substance that donates electrons in a chemical reaction and is oxidized in the process. The strength of a reducing agent is inversely related to its standard reduction potential (E°). The more negative the E° value, the stronger the reducing agent. ### Step 2: List the given half-cell reactions and their standard reduction potentials 1. \( \text{Zn}^{2+}(aq) + 2e^- \rightarrow \text{Zn}(s) \), \( E° = -0.762 \, \text{V} \) 2. \( \text{Cr}^{3+}(aq) + 3e^- \rightarrow \text{Cr}(s) \), \( E° = -0.740 \, \text{V} \) ...
Promotional Banner

Similar Questions

Explore conceptually related problems

The standard reduction potentials at 298K, for the following half cells are given: Zn^(2+)(aq)+2e^(-)hArrZn(s):E^(@)=-0.762V Cr^(3+)(aq)+3e^(-)hArrCr(s):E^(@)=-0.740V 2H^(+)(aq)+2e^(-)hArrH_(2)(g), E^(@)=0.000V Fe^(3+)(aq)+e^(-)hArrFe^(2+)(aq),E^(@)=0.770V Which is the stronget reducing agent?

The standard reduction potentials at 25^(@)C for the following half reactions are given against each: Zn^(2+) (a.q) + 2e^(-) hArr Zn (s) : " " - 0.762 Cr^(3+) (a.q) 3e^(-) hArr Cr (s) , " " - 0.740 2H^(+) + 2e^(-) hArr H_(2) (g), " " 0.00 Fe^(3+) + e^(-) hArr Fe^(2+) , " " 0.77 Which is the strongest reducing agent?

At 298 K, the standard reduction potentials for the following half reactions are given. Which acts as anode with others in electrochemical cell Zn^(+2)(aq) + 2e^(-) to Zn(s), -0.762 Cr^(+3)(aq) + 3e^(-) to Cr(s), -0.740 2H^(+)(aq) + 2e^(-) to H_2(g), -0.000 Fe^(+3)(aq) + e^(-) to Fe^(2+)(aq) , +0.762

The standard reduction potential at 298 K for the following half reactions are given below: Fe^(3+)(1M)+e^(-)rarrFe^(2+)(aq),E^(o)=0.770 V, Zn^(2+)(1M)+2e^(-)rarrZn(s),E^(o)=-0.762 V Cd^(2+)(1M)+2e^(-)rarrCd(s),E^(o)=-0.402 V, 2H^(+)(1M)+2e^(-)rarrH_(2)(g),E^(o) = 0.00 V. The strpongest reducing agent is: