Electrochemistr...

A solution containing one mole per litre of each Cu (NO3)2; AgNO3; Hg2 (NO3)2; Mg (NO3)2 is being electrolysed by using inert electrodes. The value of standard electrode potentials in volts are:

Ag+ / Ag = + 0.80V, Hg22+ / Hg = +0.79V; Cu2+ / Cu = + 0.34V and Mg2+ / Mg = – 2.37V

With increasing voltage, the sequence of deposition of metals on the cathode will be

The standard reduction potentials of Cu+/Cu and Cu2+ / Cu+ are 0.53V and 0.153V respectively. The standard electrode potential of Cu2+/Cu half cell is

The standard reduction potential values of the three metallic cations X, Y, Z are 0.52, – 3.03, and – 1.18V respectively. The order of reducing power of the corresponding metals is

For the electrochemical cell, M | M+ || X– | X, E° (M+ / M) = 0.44V and E° (X/X–) = 0.33V From this data, one can deduce that

Saturated solution of KNO3 is used to make salt bridge because

The effect of temperature increase on conduction is as follows :–

A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At wt. = 177). The oxidation state of the metal in the metal salt is

The conductivity of a saturated solution of BaSO₄ is 3.06 × 10^–6 ohm^–1 cm^–1 and its equivalent conductance is 1.53 ohm^–1 cm² equiv^–1. The K_sp for BaSO₄ will be

A gas X at 1 atm is hubbled through a solution containing a mixture of 1 MY^— and 1 MZ^— at 25°C. If the reduction potential of Z > Y > X, then

Standard electrode potentials are

Fe²⁺/Fe,        E^o = – 0.44 V

Fe³⁺/Fe²⁺,     E^o = + 0.77 V

Fe²⁺, Fe³⁺ and Fe blocks are kept together, then