Home
Class 12
CHEMISTRY
An electric current is passed through th...

An electric current is passed through three cells in series containing respectively solutions of copper sulphate, silver nitrate and potassium iodide. What weights of silver and iodine will be liberated while 1.25 g of copper is being deposited ?

Text Solution

Verified by Experts

`("Wt. of copper")/("Wt. of Iodine")=("Eqvt. Wt. copper")/("Eqvt. Wt. of Iodine")`
`"or "(1.25)/(x)=(31.7)/(127)," "x=(1.25xx127)/(31.7)`
Hence, Wt. of Iodine x = 5.0 g of iodine
`"Also, "("Wt. of Copper")/("Wt. of Silver")=(1.25)/(y)`
`=("Eqvt. wt. of Cu(= 31.7)")/("Eqvt. wt. of Silver( = 108)")`
`"Wt. of silver (y) "=(108xx1.25)/(31.7)`
= 4.26g
Promotional Banner

Topper's Solved these Questions

  • ELECTRO CHEMISTRY - I

    NCERT GUJARATI|Exercise SELF EVALUATION((A) Choose the correct answer :)|18 Videos

  • ELECTRO CHEMISTRY - I

    NCERT GUJARATI|Exercise SELF EVALUATION((D) Solve the problems :)|6 Videos

  • COORDINATION COMPOUNDS AND BIO-COORDINATION COMPOUNDS

    NCERT GUJARATI|Exercise SELF EVALUATION (A. Choose the correct answer)|18 Videos

  • ELECTROCHEMISTRY - II

    NCERT GUJARATI|Exercise SELF EVALUATION((D) Solve the problems :)|11 Videos

Similar Questions

Explore conceptually related problems

The same current if passed through solution of silver nitrate and cupric salt connected in series. If the weights of silver deposited is 1.08g . Calculate the weight of copper deposited

An electric current is passed through electrolytic cells in series one containing Ag(NO_(3)) (eq) and other H_(2)SO_(4) (aq). What volume of O_(2) measured at 25^(@)C and 750 mm Hg pressure would be liberated form H_(2)SO_(4) if (a) one mole of Ag^(+) is deposited from AgNO_(3) solution (b) 8 xx 10^(22) ions of Ag^(+) are deposited from AgNO_(3) solution.

If 1 A of current is passed through CuSO_4 solution for 10 seconds, the number of Copper atoms deposited at the cathode will be ..........

What current strength in amperes will be required to liberate 10 g of iodine from potassium iodide solution in one hour ?

Two electrolytic cells containing molten solutions of Nickel chloride & Aluminium chloride are connected in series. If same amount of electric current is passed through them, what will be the wright of Nirkel nhtained when 18 gm of Aluminium is obtained? (Al-27 gm/mole, Ni - 58.5 "gm//mole"^(1) )

Fuel cells : Fuel cells are galvanic cells in which the chemical energy of fuel cell is directly converted into electrical energy. A type of fuel cell is a hydrogen - oxygen fuel cell. It consists of two electrodes made up of two porous graphite impregnated with a catalyst ( platinum, silver, or metal oxide ). The electrodes are placed in aqueous solution of NaOH . Oxygen and hydrogen are continuously fed into the cell. Hydrogen gets oxidized to H^(o+) which is neutralized by overset(c-)(O)H, i.e., anodic reaction. At cathode, O_(2) gets reduced to overset(c-)(O)H Hence, the net reaction is The overall reaction has DeltaH=-285.6 kJ mol^(-1) and DeltaG=-237.4 kJ mol^(-1) at 25^(@)C What is the value of DeltaS^(c-) for the fuel cell at 25^(@)C ?