17. All of the above 18. hydrogen gas and oxygen gas 19. <span>deposition of a metal layer on a material</span>
Electrolytic cells use electric currents to drive a non-spontaneous reaction forward. This is also used in electroplating which involves the movement of metal cations to the surface of another metal. Water can also undergo electrochemical reactions by splitting it into its gaseous components, hydrogen and oxygen.
Here anions and cation of two reagents interchange between themselves.
2 molecules of HCl (hydrochloric acid) reacts with 1 molecule of (sodium sulphite) to produce 2 molecules of NaCl (sodium chloride) and 1 molecule of (sulphurous acid)
(sodium sulphite) to produce 2 molecules of NaCl (sodium chloride) and 1 molecule of
(sulphurous acid)
