A solution containing 4.5 mM of MnO ₄⁻ and 15 mM of Mn ²⁺ shows pH of 2 . The potential of half-cell reaction is ...... . (Given, 15=1.76 and 45=1.653 and standard potential of MnO ₄⁻ Mn ²⁺ ) is 1.51 ~V )

Question

Quantrex Academy · Accepted Answer

Correct answer: B. 1.31 ~V

aligned & (b) MnO ₄⁻+8 H ⁺+5 e⁻ Mn ²⁺+4 H ₂ O & E=E_ Mn ^ ⁷⁺ Mn ²⁺ /+ 0.059 5 [ MnO ₄⁻ ] [ H ⁺ ]^8 [ Mn ²⁺ ] & E=1.51+ 0.059 5 [ 4.5 1000 ] [10⁻² ]^8 [ 15 1000 ] & E=1.31 ~V aligned Hence, the correct option is (2).

A solution containing 4.5 mM of MnO ₄⁻ and 15 mM of Mn ²⁺ shows pH of 2 . The potential of half-cell reaction is ...... . (Given, 15=1.76 and 45=1.653 and standard potential of MnO ₄⁻ Mn ²⁺ ) is 1.51 ~V )

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