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?

+ 0.59 volt

+ 0. 55 volt

+ 0.35 volt

+ 0.30 volt
diffcult
Solution
+ 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 CuSO_{4} react with nickel. Hence, CuSO_{4} solution cannot be stored in a nickel vessel.
SIMILAR QUESTIONS
0.01 mole of Fe_{3}O_{4} is treated with excess of KI solution in presence of dilute H_{2}SO_{4} whereby iron is reduced to Fe^{2+} along with liberation of iodine. What volume of 0.1 M Na_{2}S_{2}O_{3} will be needed to reduce the librated iodine?
In which of the following reaction, oxidation number of N remains unchanged?
KMnO_{4} 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 halfcell represented as if the concentration of H^{+} ion is doubled in solution?
In which of the following oxidation state of phosphours is + 3?
Determine the volume of M/8 KmnO_{4} solution required to react completely with 25.0 cm^{3} of M/4 FeSO_{4} solution is acidic medium.
Calculate the concentration of hypo (Na_{2}S_{2}O_{3}.5H_{2}O) solution in g dm^{–3} if 10.0 of this solution decolourised 15 mL of M/40 iodine solution.
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 KMnO_{4} solution. Calculate the percentage of pure oxalate in the sample.
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.
0.2 of sample H_{2}O_{2} reduced 20 ml of 0.1 M KMnO_{4} solution in acidic medium. What is the percentage purity of H_{2}O_{2}?
16.6 g of pure potassium iodide was dissolved in water and the solution was made up to one litre. V cm^{3} of this solution was acidified with 20 cm^{3}of 2 M HCl. The resulting solution required 10 cm^{3} of decinormal KIO_{3}for complete oxidation of I^{–} ions to ICl. Find out the value of V.