Question

Name the cause of change that takes place during the conversion of water into hydrogen and oxygen.

Answer 1

• Water can be split into its components hydrogen and oxygen by passing electricity through it.
• This process is called electrolysis and this is a chemical change.
• Chemical change involves a change in a chemical property of the substances which involves the formation of new substances.
• The overall reaction can be represented as:
• $2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to 2{\mathrm{H}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

Hence, the cause of this change is electricity.