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Why does the cathode gain in mass during the purification of copper by electrolysis?
Wiki User
∙ 8y ago
Because the cathode is where reduction takes place, meaning the it gains electrons. When it gains electrons, it attracts the copper cation (Cu^2+) and as the copper cation reaches the cathode, it picks up the electrons from the cathode, and is deposited as solid copper (Cu). This results in the cathode gaining mass over time.
Wiki User
∙ 8y ago
Wiki User
∙ 8y agoBecause pure copper is deposited on the cathode.
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What is meant by anode and cathode?
Anode is positive electrode which attracts the negative anions while cathode is the negative electrode which attracts the positive cations during electrolysis.
Does anode lose weight and cathode increase in electroplating?
yes, the weight of anode is decreased & added to the weight of the cathode during electroplating
What is meaning of SK value in transformer oil?
It shows the Purification during the filtration of crude oil.
Why is copper loss negligible during open circuit test?
Copper losses are energy losses from the windings, due to the currents passing through them. During an open-circuit test, there is no secondary current (so no secondary copper losses) and the primary current is very low (so the primary copper losses are minimum).
What is the importance of DC current flow instead of AC during electroplating process?
Electroplating involves moving metal from one electrode to another, through a conductive solution. Typically a metal at the anode will lose an electron, become dissolved in solution, and then move in the solution towards the cathode. Once reaching the cathode, the metal ion gains electron(s) and is thus deposited at the cathode. With AC, the metal ions would just move back and forth in the solution, generating heat but no electroplating.
Why does the blue colour remains blue during electrolysis of copper sulphate solution using copper electrodes?
During the electrolysis of Copper sulphate ,at the cathode ,copper and hydrogen both being positively charged migrate towards the cathode.While at the anode
Where does copper collect during electrolysis?
The cathode, where the +ions in solution accept electrons and become neutral metal atoms.
An electrode at which aluminium is deposited during electrolysis of alumina?
Cathode
What will be the products on cathode and anode during electrolysis of the solution of magnesium sulphate?
Cathode - Hydrogen Anode - Oxygen
What forms at the cathode during electrolysis of a metal compound?
reduction reaction.
What would be formed at the cathode and the anode during the electrolysis of sodium hydroxide solution?
Hydrogen gas would evolve from the cathode and oxygen gas would evolve from the anode.
What is a cationic molecule?
A cationic molecule is a positively charged ion. It is attracted to the cathode, or the negative pole, during electrolysis.
Why should copper sulphate solution be acidified during copper electroplating?
to transfer anode to cathode
Why does a potato acquire a greenish deposit at the anode during electrolysis of potato?
You do not mention what you are using as the anode and cathode, but i would assume that given the green colour you are using copper or brass perhaps as the anode, and it is breaking down into a copper carbonate(which is green). By applying electrical current to the circuit you are speeding up the conversion of copper to copper carbonate(or similar).
What would happen if you used an alternating current during electrolysis?
the cathode and anode keeps interchanging between each other
Useful amounts of copper can be isolated during a process called electrolysis true or false?
Copper can be refined by electrorefinning.
Why does the color of copper sulfate solution changes during electrolysis?
The color fades as there is a discharge of copper two ions to form copper atoms
