IB Chemistry home > Syllabus 2016 > Redox processes > Electrolysis in aqueous solutions

Syllabus ref: 19.1

Electrolysis of molten ionic compounds was covered previously. In this chapter we look at the electrolysis of aqueous solutions, in both a qualitative and quantitative sense.


When aqueous solutions are electrolysed, water can be oxidized to oxygen at the anode and reduced to hydrogen at the cathode.

Current, duration of electrolysis and charge on the ion affect the amount of product formed at the electrodes during electrolysis.

Electroplating involves the electrolytic coating of an object with a metallic thin layer.

Applications and skills

Explanation of the products formed during the electrolysis of aqueous solutions.

Perform lab experiments that could include single replacement reactions in aqueous solutions.

Determination of the relative amounts of products formed during electrolytic processes.

Explanation of the process of electroplating.

In Chapter 9.7