In electrolysis, the electrode where oxidation occurs is called the ___ and is typically positively charged.

Anode

True or False: Non-electrolytes can conduct electricity when dissolved in water.

False. Non-electrolytes do not dissociate into ions and cannot conduct electricity.

What is the role of the cathode in an electrolytic cell?

The cathode is where reduction occurs, and cations gain electrons to form neutral atoms or molecules.

What is the primary purpose of electrolytic refining of metals?

The primary purpose of electrolytic refining of metals is to purify metals containing impurities to obtain pure metal.

Fill in the blank: The reaction at the cathode during the electrolytic refining of copper is ___ → Cu.

Cu2 + 2e-

True or False: The anode reaction in the electrolytic refining of copper involves the conversion of pure copper to copper ions.

True

What defines strong and weak electrolytes?

Strong and weak electrolytes are defined by the degree of dissociation, which is the percentage of molecules that dissociate into ions in solution.

Fill in the blank: The degree of dissociation of an electrolyte is calculated as (Number of molecules dissociated/Total number of molecules) × ___ .

100

Electrolysis of acidified water results in the production of which gases at the electrodes?

At the cathode, hydrogen gas (H2) is produced, while at the anode, oxygen gas (O2) is generated.

Fill in the blank: A strong electrolyte is a substance that ___ completely into ions in solution.

Dissociates

True or False: In the electrolysis of aqueous copper sulfate, both sulfate ions and hydroxide ions are discharged at the electrodes.

False. Only copper ions are discharged at the cathode, while sulfate ions and hydroxide ions are not discharged.

What determines the selective discharge of ions during electrolysis?

The selective discharge of ions is influenced by their concentration, the nature of the electrodes, and their position in the electrochemical series.