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Tuesday, May 11, 2021

Find the Volume of gas evolved by passing 0.965 Amp current for 1 hour through an aqueous solution CH3COONa at 250c and 1 atm?


Related Questions:

(1) A current of 2.68 ampere is passed for one hour through an aqueous solution of copper sulphate using copper electrodes. Calculate the change in the mass cathode and that of anode. ( atomic mass of copper is 63.5 u).

(3) On passing 3 faradays of electricity through three electrolytic cells connect in series containing Ag+ , Ca+2 and Al+3 ions respectively , the molar ratio in which three metals ions are liberated at the electrode is

During electro refining of Cu how much time is needed to produce 250g Cu on the cathode if the current is kept at 11 A?

Given that current (i) = 11 A = 11 cycle/second

Number of moles of copper deposited on cathode is 


Related Questions:

(1) A current of 2.68 ampere is passed for one hour through an aqueous solution of copper sulphate using copper electrodes. Calculate the change in the mass cathode and that of anode. ( atomic mass of copper is 63.5 u).

(3) On passing 3 faradays of electricity through three electrolytic cells connect in series containing Ag+ , Ca+2 and Al+3 ions respectively , the molar ratio in which three metals ions are liberated at the electrode is

Zn amalgam is prepared by electrolysis of aqueous ZnCl2 using 9 gram Hg cathode. How much current is to be passed through ZnCl2 solution for 1000 seconds to prepare of Zn amalgam with 20% weight? (Atomic wt, Zn = 65.4 g)

 Let “x “gram of Zn deposited on 9 gm of Hg:


Related Questions:

(1) A current of 2.68 ampere is passed for one hour through an aqueous solution of copper sulphate using copper electrodes. Calculate the change in the mass cathode and that of anode. ( atomic mass of copper is 63.5 u).

(3) On passing 3 faradays of electricity through three electrolytic cells connect in series containing Ag+ , Ca+2 and Al+3 ions respectively , the molar ratio in which three metals ions are liberated at the electrode is



Monday, May 10, 2021

1 M aqueous solution of NaCl undergo electrolysis if 50 mA current is passed for 12 hours assume current efficiency is 25%. The total volume of gas produced at standard state is. NaCl (aq) solution undergoes electrolysis as:

NaCl(aq) àNa+ + Cl-

        H2O à H+ + HO-

Reactions:

At cathode: 2H+ + 2e-à H2(g)

At anode:   2Cl-à Cl2(g) + 2e-


Related Questions:

(1) A current of 2.68 ampere is passed for one hour through an aqueous solution of copper sulphate using copper electrodes. Calculate the change in the mass cathode and that of anode. ( atomic mass of copper is 63.5 u).


How long has a current of 3 ampere to be applied through a solution of silver nitrate to coat a metal surface of 80 cm2 with 0.005 cm thick layer density of silver is 10.5g/cm3.

Given Area = 80 cm3

   Thickness = 0.0005 cm

        Density= 10.5 gl cm3

Thus Mass of silver deposited on cathode is = 80 cm3 x 0.0005 cm x10.5 gm/cm3= 0.42 gm

Related Questions: