What is an electrolyte?

A molten or aqueous ionic compound that conducts electricity and is decomposed by it

What happens to ions at the cathode?

They gain electrons (reduction)

Hydrogen ions and hydroxide ions from water

$2\text{H}^+ + 2e^- \rightarrow \text{H}_2$

Anode sludge containing impurities

It contains no free ions to carry the current

13questions. Pick an answer and you'll see why right away.

What is an electrolyte?
Which electrode do positive ions move towards during electrolysis?
What happens to ions at the cathode?
When molten lead(II) bromide is electrolysed, what is produced at the cathode?
In aqueous solutions, which extra ions are present besides those of the dissolved compound?
At the cathode in an aqueous solution, which cation is discharged?
What is produced at the anode when concentrated aqueous sodium chloride is electrolysed?
What is the cathode product when concentrated aqueous sodium chloride is electrolysed?
Which half-equation correctly shows hydrogen being produced at the cathode?
In electroplating an object with silver, which electrode is the object made?
When copper is purified by electrolysis, what is made the anode?
What is left behind below the anode when impure copper is refined by electrolysis?
Why can a covalent liquid such as paraffin not undergo electrolysis?