Home
Class 12
CHEMISTRY
A 100W and 110V incandescent lamp is con...

A 100W and 110V incandescent lamp is connected in series with an electrolytic cell containing `CdSO_4` solution. What mass of cadmium will be deposited at the cathode after 4hrs of electricity.

Text Solution

Verified by Experts

Step I:
Calculation of the quantity of charge passed:
We know, that
Watt= Ampere `times` volt
`Ampere= (Wat t)/(Vol t)=100/110`
Now charg e= Current `times` Time
`=(100/110 amp.)times 4 times 60 times 60`
`=13091 C`
Step II:
Calculation of mass of Cadmium deposited:
The cathodic reaction is
`Cd^(2+) (aq)+2e^(-) to Cd(s)`
`112.2g 2 times 96500 C`
`because 2 times 96500 C` of charge deposited Cd=112.2 g
`therefore 13091C` charge will deposite Cd
`=(112.2g)/(2 times 96500 C) times 13091C`
=7.61g
Promotional Banner

Topper's Solved these Questions

  • ELECTRO-CHEMISTRY

    OSWAAL PUBLICATION|Exercise Topic - 3 ELECTROLYSIS , LAWS OF ELECTROLYSIS, BATTERIES, FUEL CELLS AND CORROSION (SHORT ANSWER TYPE QUESTIONS)|7 Videos

  • D - BLOCK ELEMENTS F - BLOCK ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC - 2 (F - BLOCK ELEMENT , LANTHANOIDS AND ACTINOIDS)(LONG ANSWER TYPES QUESTIONS)|6 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC 2 (LONG ANSWER TYPE QUESTIONS-II)|2 Videos

Similar Questions

Explore conceptually related problems

A 100 W lamp is connected in series with a 60 W lamp across a 220 V supply. Which of the following statement is wrong ?

Two Faraday of electricity is passed through a solution of CuSO_(4) . The mass of copper deposited at the cathode is : (at. mass of Cu =63.5 amu)

A solution of CuSO_(4) is electrolyzed for 10 min with a current of 1.5A . What is the mass of Cu deposited at the cathode? [ Atomic mass of Cu=63g]

When a 40 W, 220 V lamp and 100 W, 220 V lamp are connected in series across 440 V supply

Two electrolytic cells, one containing acidified ferrous sulphate and other containing acidified ferric sulphate are connected in series. The ratio of iron deposited at cathodes in the two cells will be respectively

A current of 1 ampere flows in a series circuit containing an electric lamp and a conductor of 5Omega when connected to a 10 V battery. Calculate the resistance of the electric lamp. Now if a resistance of 10Omega is connected in parallel with this series combination, what change [if any] in current flowing through 5Omega conductor and potential difference across the lamp will take place? Give reason.