Question

 

Can a solution of 1 M copper sulphate be stored in a vessel made of nickel metal? Given that

.

or Is it possible to store copper soulphate solution in a nickel vessel?

Solution

Correct option is

+ 0.59 volt

 

In this problem, we want to see whether the following reaction takes place or not

           

       

By convention, the cell may be represented as

           

We are given the oxidation potentials as

         

    

Hence, the reduction potentials will be

         

                       = – 0.25 volt

                         = + 0.34 volt

  

                    = + 0.34 – (– 0.25)

                    = + 0.59 volt

Thus EMF comes out to be positive. This implies that CuSO4 react with nickel. Hence, CuSO4 solution cannot be stored in a nickel vessel.

SIMILAR QUESTIONS

Q1

0.01 mole of Fe3O4 is treated with excess of KI solution in presence of dilute H2SO4 whereby iron is reduced to Fe2+ along with liberation of iodine. What volume of 0.1 M Na2S2O3 will be needed to reduce the librated iodine?

Q2

In which of the following reaction, oxidation number of N remains unchanged?

Q3

 

KMnO4 acts as a strong oxidizing agent in acidic medium. The reaction that occurs is

What will be the effect on the electrode potential of a half-cell represented as  if the concentration of H+ ion is doubled in solution?

Q4

In which of the following oxidation state of phosphours is + 3?

Q5

Determine the volume of M/8 KmnO4 solution required to react completely with 25.0 cm3 of M/4 FeSO4 solution is acidic medium.

Q6

Calculate the concentration of hypo (Na2S2O3.5H­2O) solution in g dm–3 if 10.0 of this solution decolourised 15 mL of M/40 iodine solution.

Q7

0.5 g of an impure sample of oxalate was dissolved in water and the solution made to 100 ml. On titration 10 ml of this solution required 15 ml of N/20 KMnO4 solution. Calculate the percentage of pure oxalate in the sample.

Q8

Predict whether zinc and silver react with 1 M sulphuric acid to give out hydrogen or not. Give that the standard potentials of zinc and silver are – 0.76 volt and +0.80 volt respectively.

Q9

0.2 of sample H2O2 reduced 20 ml of 0.1 M KMnO4 solution in acidic medium. What is the percentage purity of H2O2?

Q10

16.6 g of pure potassium iodide was dissolved in water and the solution was made up to one litre. V cm3 of this solution was acidified with 20 cm3of 2 M HCl. The resulting solution required 10 cm3 of decinormal KIO3for complete oxidation of I ions to ICl. Find out the value of V.