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The blue color of copper(II) chloride fades during electrolysis because copper ions (Cu²⁺) are reduced to copper atoms (Cu) at the cathode. This causes the copper ions in solution to decrease, resulting in the fading of the blue color.

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Q: Why the blue colour of copper chloride fades during electrolysis?
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During the separation of copper chloride what element is formed at the anode?

During the electrolysis of copper chloride, chlorine gas is formed at the anode. This is because chloride ions (Cl-) are attracted to the positive electrode (anode) and are oxidized to form chlorine gas.


Why does the blue colour remains blue during electrolysis of copper sulphate solution using copper electrodes?

During electrolysis of copper sulfate solution using copper electrodes, the blue color of the solution remains because copper ions from the copper sulfate solution plate onto the cathode, replacing the copper atoms in the electrode. This does not change the color of the solution as the copper ions remain in solution, maintaining the blue color.


When copper is purified by electrolysis which electrode do you think that the pure copper collects at?

Pure copper collects at the cathode during electrolysis because copper ions are reduced at the cathode, gaining electrons and forming solid copper.


What is the gas evolved at anode during electrolysis of aqueous NaCl?

Chlorine gas is evolved at the anode during the electrolysis of aqueous sodium chloride (NaCl) because chloride ions are oxidized to form chlorine gas.


Why chloride ions are discharged at anode instead of hydroxide ions during the electrolysis of brine?

Chloride ions have a lower standard reduction potential than water, making them easier to oxidize at the anode compared to hydroxide ions. Therefore, chloride ions are preferentially discharged at the anode during the electrolysis of brine.

Related questions

During the separation of copper chloride what element is formed at the anode?

During the electrolysis of copper chloride, chlorine gas is formed at the anode. This is because chloride ions (Cl-) are attracted to the positive electrode (anode) and are oxidized to form chlorine gas.


Why does the blue colour remains blue during electrolysis of copper sulphate solution using copper electrodes?

During electrolysis of copper sulfate solution using copper electrodes, the blue color of the solution remains because copper ions from the copper sulfate solution plate onto the cathode, replacing the copper atoms in the electrode. This does not change the color of the solution as the copper ions remain in solution, maintaining the blue color.


What is the electrolysis of sodium chloride?

1. The products of the molten sodium chloride electrolysis are sodium and chlorine. 2. The products of the water solution of sodium chloride electrolysis are sodium hydroxide and hydrogen.


How could a solution of copper chloride and water be separated into its starting substances?

The copper chloride solution can be separated into its starting substances by a process called electrolysis. During electrolysis, an electric current is passed through the solution, causing the copper ions to be reduced at the cathode to form copper metal, and the chloride ions to be oxidized at the anode to form chlorine gas and water. This results in the separation of copper and chloride ions.


When copper is purified by electrolysis which electrode do you think that the pure copper collects at?

Pure copper collects at the cathode during electrolysis because copper ions are reduced at the cathode, gaining electrons and forming solid copper.


Why Na ion and OH- ion not combine in electrolysis of aqueous NaCl?

They actually do combine during electrolysis of aqueous Sodium Chloride


Why is potassium chloride used in electrolysis?

Potassium chloride is used in electrolysis because it can conduct electricity when dissolved in water. During electrolysis, the potassium ions and chloride ions in the solution allow for the flow of current, which leads to the movement of ions and the chemical reactions that occur at the electrodes. This allows for the production of desired products in electrolysis processes.


What is the gas evolved at anode during electrolysis of aqueous NaCl?

Chlorine gas is evolved at the anode during the electrolysis of aqueous sodium chloride (NaCl) because chloride ions are oxidized to form chlorine gas.


Why does a potato acquire a greenish deposit at the anode during electrolysis of potato?

The greenish deposit on the potato at the anode during electrolysis is likely due to the formation of copper hydroxide or copper carbonate. This occurs when the copper electrode at the anode reacts with the water and compounds present in the potato, leading to the deposition of copper compounds on the surface of the potato.


Why chloride ions are discharged at anode instead of hydroxide ions during the electrolysis of brine?

Chloride ions have a lower standard reduction potential than water, making them easier to oxidize at the anode compared to hydroxide ions. Therefore, chloride ions are preferentially discharged at the anode during the electrolysis of brine.


Why does the color of copper sulfate solution changes during electrolysis?

The color change in copper sulfate solution during electrolysis occurs because copper ions from the solution are attracted to the cathode, where they are reduced to form solid copper metal. This causes the solution to turn from blue to clear as the copper ions are removed.


Useful amounts of copper can be isolated during a process called electrolysis true or false?

True. Copper can be isolated in useful amounts during electrolysis, where an electric current is passed through a solution containing copper ions, causing them to deposit on the cathode. This process is commonly used in industries to extract and purify copper.