Question

predict what is formed at each electrode in the electrolysis of:
1. molten lithium oxide
2. copper chloride solution
3. sodium sulfate solution
someone help plz

Answer 1

H+ ions are attracted to the cathode , gain electrons and form hydrogen gas. OH - ions are attracted to the anode , lose electrons and form oxygen gas.

During electrolysis ions move towards the electrodes. When an ion reaches the electrode they either lose or gain an electron depending on their charge. Negatively charged ions lose electrons to become neutral atoms Positively charged ions form neutral atoms via gaining electrons.

Answer 2

Electrolysis

Explanation:

• As we know that during the electrolysis, when the current is passed in order to initiate the chemical reaction, different products are formed at the cathode and anode. The simple process of electrolysis is shown below.
• The products formed at each electrode after electrolysis of some compounds are shown below,

• Molten lithium oxide-

1. Electrolysis of the salt gives molten lithium metal, at the cathode due to the reduction of lithium ions.
2. At the same time, on the anode, chlorine gas is evolved due to the oxidation of chloride ions.

• Copper chloride solution-

1. Similarly, during electrolysis of this salt Copper deposition occurs at the cathode since copper ions are reduced.
2. At the same time, on the anode, chlorine gas is evolved due to the oxidation of chloride ions.

• sodium sulfate solution - During electrolysis at cathode, Hydrogen gas is evolved while on the anode oxygen gas is formed.