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प्रश्न
State your observation for the following electrolytic reaction
Aqueous copper sulphate is electrolysed between platinum electrodes.
उत्तर
When the electrolysis of copper sulphate(aqueous) is electrolysed between platinum electrodes the following reaction follows :
\[\ce{CuSO4 ⇌ Cu^{+2} + SO^{2-}4 }\]
\[\ce{H2O ⇌ H+ + OH-}\]
Reaction at cathode : Copper ions and hydrogen ions migrate towards the cathode, `"Cu"^(+2)` ions being lower in the electrochemical series are preferentially discharged to hydrogen ions to form neutral copper atoms at platinum cathode.
\[\ce{Cu^{+2} + 2^{e-} -> Cu}\]
Reaction at anode : Sulphate ions and hydroxyl ions migrate towards the anode, Hydroxyl ions are preferentially discharged to sulphate ions at anode, to form neutral particles of `"OH"^-`, The electrically neutral hydroxyl reacts
among themselves to give water and oxygen.
\[\ce{OH- - e- -> OH}\]
\[\ce{4(OH) ->[-4e-] 2H2O + O2}\]
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संबंधित प्रश्न
State the electrode reaction at the anode during electrolysis of:
magnesium chloride (molten).
Write down the word or phrase from the bracket that will correctly fill in the blank in the following sentence:
We can expect that pure water ________________ (will / will not) normally conduct electricity.
Complete the sentence by choosing correct word given in bracket.
Electrolysis is the passage of ___________________
(electricity / electrons)
Write down the changes that will be seen in each instance and explain the reason behind them.
Dilute H2SO4 was taken in an electrolytic cell and an electric current was passed through it.
Fill in the blank :
Hydrogen and metallic ions are ____________ because they ____________ electrons.
Fill in the blank :
Non-metallic ions are _____________ because they _____________ electrons.
Name : A positively charged not metallic ion
Define or explain the term: Electrolysis.
Pure water consists entirely of ______.
Electrolysis of acidulated water is an example of ______.
