(i) Electrolysis: It is the decomposition of a chemical compound [electrolyte] in the aqueous or fused [molten] state by the passage of direct electric current resulting in discharge of ions as…
(i) What do you observe at the cathode and anode respectively. (ii) Name the cation that remains as a spectator ion in the solution. (iii) Which equation for the reaction at the anode is correct. 1. Ni ⟶ Ni2+ + 2e– 2. Ni + 2e– ⟶ Ni2+ 3. Ni2+ ⟶ Ni + 2e– 4. Ni2+ + 2e– ⟶ Ni(i) The observations at cathode and anode are: At cathode: Ni2+ ions move towards cathode and are discharged as neutral Ni atoms by gain of electrons. Thus, Ni is deposited at…
Cathode Reason — Pure copper is deposited on the thin sheet of pure copper placed at the cathode.
Conductor Electrolyte The flow of electricity takes place by flow of electrons which have negligible mass. The flow of electricity takes place by flow of ions which are denser compared…
(i) Conducts electricity in aqueous or in molten state — D: An electrolyte (ii) Loss of electrons takes place at anode — A: oxidation (iii) A reducing electrode — B: Cathode (iv) Electrode…
An alkali which completely dissociates into ions is lithium hydroxide
Pure thin sheet of copper is used as cathode.
As graphite is unaffected by the reactive bromine vapours released at the anode hence, a graphite anode is preferred to platinum in the electrolysis of molten lead bromide.
(i) Ions only (ii) Molecules only (iii) Ions and Molecules