1. Tardigrade
  2. Question
  3. Chemistry
  4. The standard reduction potential at 298 K for the following half cell reactions are given below: Zn 2+(a q)+2 e- longrightarrow Zn (s) ; E°=-0.762 V Cr 3+(a q)+3 e- longrightarrow Cr (s) ; E°=-0.740 V 2 H +(a q)+2 e- longrightarrow H 2(g) ; E°=0.0 V Fe 3+(a q)+e- longrightarrow Fe 2+(a q) ; E°=0.77 V Which is the strongest reducing agent?

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Q. The standard reduction potential at $298\, K$ for the following half cell reactions are given below :
$Zn ^{2+}(a q)+2 e^{-} \longrightarrow Zn _{(s)} ; E^{\circ}=-0.762\, V$

$Cr ^{3+}(a q)+3 e^{-} \longrightarrow Cr _{(s)} ; E^{\circ}=-0.740 \,V$

$2 H ^{+}(a q)+2 e^{-} \longrightarrow H _{2(g)} ; E^{\circ}=0.0\, V$

$Fe ^{3+}(a q)+e^{-} \longrightarrow Fe ^{2+}(a q) ; E^{\circ}=0.77\, V$
Which is the strongest reducing agent?

Electrochemistry

Solution:

$ Zn$ has lowest reduction potential value and it will be easily oxidised. Therefore, it acts as strongest reducing agent.