2H2O+NaCl=

Likely you’re asking for the products of electrolysis of a NaCl solution (brine).

Balanced overall equation: 2 NaCl(aq) + 2 H2O(l) → Cl2(g) + H2(g) + 2 NaOH(aq)

Half-reactions:

• Anode (oxidation): 2 Cl− → Cl2(g) + 2 e−
• Cathode (reduction): 2 H2O(l) + 2 e− → H2(g) + 2 OH−(aq)

Net result: chlorine gas formed at the anode, hydrogen gas at the cathode, and sodium hydroxide remains in solution.