मराठी

Write Equations for the Reactions Taking Place at the Two Electrodes (Mentioning Clearly the Name of the Electrode) During the Electrolysis of : Acidified Copper Sulphate Solution with Copper Electrodes - Chemistry

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प्रश्न

Write equations for the reactions taking place at the two electrodes (mentioning clearly the name of the electrode) during the electrolysis of Acidified copper sulphate solution with copper electrodes

उत्तर

Electrodes: Cathode: Copper

Anode: Platinum

Reaction at the cathode: `Cu^(2+) + 2e^(-) -> Cu`

Reaction at andde: `4OH^(-) - 4e^(-) -> 4OH`

                            `2OH + 2OH -> 2H_2O + O_2`

 

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2015-2016 (March) Science Paper 2

संबंधित प्रश्‍न

What is the difference between:

Electrolytic dissociation and ionisation.


State the electrode reaction at the anode during electrolysis of:
sodium chloride solution.


Write down the word or phrase from the bracket that will correctly fill in the blank in the following sentence:
Pure water consists entirely of ________________ (ions/ molecules).


From the given list :
NaCl, NaOH, H2O (pure), NH4OH, urea, dil.H2SO4, glucose, acetic acid, H2CO3.
Select : 
a) Substances which will behave as strong electrolytes.
b) Substances which will behave as weak electrolytes.
c) Substances which are non-elctrolytes.


Fill in the blank :
Hydrogen and metallic ions are ____________ because they ____________ electrons.


 


Choose the correct answer from the option given below:
Electrolysis of acidulated water is used in the production of


If an electrolyte is described as a 'strong electrolyte' what does this mean?


Copy and complete the following table which refers to two practical applications of electrolysis.

  Anode Electrolyte Cathode
Silver plating of a spoon   Solution of potassium argentocyanide  
Purification of copper      

Write the equations of the reactions which take place at the cathode and anode when acidified water is electrolyzed.


Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.

If the compound formed between X and Y is melted and an electric current passed through the molten compound, the element X will be obtained at the ______ and Y at the ______ of the electrolytic cell. (Provide the missing words).


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