Electrolyte - GCSE Chemistry Definition

What is an electrolyte?

In GCSE chemistry, an electrolyte is an ionic compound which is able to conduct electricity when it is molten or aqueous (dissolved in water). An electrolyte can conduct electricity because the ions are free to move and carry a charge. 

During electrolysis, electricity is passed through the electrolyte, resulting in the ions moving to electrodes. Positively charged ions will move to the negative electrode (the cathode) and negatively charged ions will move to the positive electrode (the anode). Ions will be discharged at the electrode to produce the corresponding element. Electrolysis will not work with a solid ionic compound because the ions are unable to move.

For example, during the electrolysis of molten lead(II) bromide, lead(II) bromide is the electrolyte, consisting of positively charged lead ions, and negatively charged bromide ions. When electricity is passed through the electrolyte, the lead ions move to the cathode, and the bromide ions move to the anode. Lead ions will be discharged and form lead metal. Bromide ions will be discharged to form bromine. 

Electrolyte Revision Resources to Ace Your Exams

Make sure you use our detailed revision notes on electrolytes and electrolysis to really boost your grades. These clearly explain the process of electrolysis for various electrolytes while our electrolysis exam questions will show you how marks are awarded and help refine your exam technique. The electrolysis flashcards are perfect for testing your knowledge of key terms, helping you retain essential information and feel confident in your exams.

Explore Our GCSE Chemistry Revision Resources