Salt Bridge

SALT BRIDGE

• Contains a solution of non reacting ions (KCl, KNO₃, Na₂SO₄).
• It functions is to maintain electrical neutrality while redox reactions proceed at the electrodes.

OXIDATION HALF-CELL (ANODE)	REDUCTION HALF-CELL (CATHODE)
Zn (s) → Zn2+(aq) + 2e-	Cu2+(aq) + 2e- → cu (s)
·         Zn2+ ions enter the solution causing an overall excess of positive charge. ·         Anode loses mass/erode ·         Cl- ions from salt bridge move into anode (Zn) half-cell.	·         Cu2+ ions leave the solution causing an overall excess of negative charge. ·         Cathode gain mass/deposit ·         K+ ions from salt bridge move into cathode (Cu) half-cell.