NANDANI KUMARI

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Following reactions occur at cathode during the electrolysis of aqueous copper (II) chloride solution:Cu2+(aq) + 2 e-2 ———–> Cu(s) E° = + 0.34 VH+(aq) + e-1 ————-> 1/2H2(g) E...

Since ECu2+/Cu has a greater positive value than EH+/H, the reaction that is feasible at the cathode is

Cu2+(aq) + 2e Cu(s)

Two half-reactions of an electrochemical cell are given below :MnO–4 (aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = 1.51 VSn2+ (aq) → Sn4+ (aq) + 2e–, E° = + 0.15 V.Construct the redox reaction...

Two half cell reactions of an electrochemical cell are given below :MnO–4(aq) + 8H+ (aq) + 5e– → Mn2+ (aq) + 4H2O (I), E° = + 1.51 VSn2+ (aq) → 4 Sn4+ (aq) + 2e–, E° = + 0....

The standard electrode potential for fe3+/fe2+and I2/I are +0.77V and +0.54 V respectively.Draw the standard cell notation.Identify the anode and cathode as the current us drawn from it.Write the c...

why does AgNO3 solution become bluish when copper rod is dipped in it ?The standard reduction potential of CU and Ag = +0.34v and +0.80v respectively.

The standard reduction potential of copper is lower than silver.
E Cu2+/Cu = 0.34V
E Ag+/Ag = 0.80V
The copper is oxidized when dipped into AgNO3 solution and becomes bluish.

2 AgNO3 + Cu –> Cu(NO3)2 + 2 Ag

An electrochemical cell is constructed by coupling zinc and silver electrolyte at Standard States.In which cell does reduction occur?Write half-cell reaction where reduction is involved.Which metal...

predict whether zinc react with one M hydrochloric acid to give hydrogen gas or not. Give that standard reduction potential of zinc and hydrogen are -0.76 volt and 0.0 volt respectively.

The following reaction should take place: Z n + H ₂ S O ₄ Z n S O ₄ + H ₂

_{Std. EMF of the cell ( E c e l l ) = [ Std. redn. pot. of R.H.S. electrode ] [ Std. redn. pot. of L.H.S. electrode ] = 0 ( 0.76 ) = + 0.76}

Thus, the EMF of the cell comes out to be positive. hence, the reaction takes place.