Hypothesis“Electrolysis of water is the decomposition of water into oxygen and hydrogen gas due to the passage of an electric current through the water.” As we know, water is a model of molecular compound, in which atoms are bonded together by sharing electrons. This type of bond is known as a covalent bond. To split the aqueous solution into two constituents, hydrogen H and oxygen O2, we use the method of electrolysis of water. I predicted that we will separate the aqueous solution into hydrogen and oxygen substances by passing an electric current through them. The negatively charged electric current is called the cathode, while the positively charged electric current is called the anode. Additionally, positively charged ions (cations) are likely to move towards the cathode, while negatively charged ions (anions) are likely to move towards the anode. The reaction that occurs during the electrolysis of water is described as below: 2H2O (aq) → 2H2 (g) + O2 (g) Materials - Plastic cup - Cable - 9 volt battery - 2 test tubes - Electrolyte - NaHCO3 Method - Place the first 30 to 50 ml of NaCl in a plastic cup to act as an electrolyte - Label a positive (+) and negative (-) test tube and connect 2 wires to the 9 volt battery - Insert one wire into each test tube tubes with NaHCO3 and label each tube (no air in the tube)- Observe what happens to the exposed part of the wire in each tube.ResultsFig.1. The electrolysis of water that occurs in a plastic cup, sodium chloride (NaCl) solution, will help the conductor of electric current in electrolysis. Sodium chloride facilitates the flow of electrical current along the solution and battery terminals. Since sodium chloride is a salt when in contact with water, it breaks down into the Na+ and Cl- ions found... in the middle of the paper... transmits electricity along the electrodes. Since silver nitrate is an oxidizer that loses electrons and allows current to flow, however the reduction that occurs in the cathode gains electrons and galvanizes the coin. The process that continues during copper electroplating is described below: (Anode) Cu2+ (aq) + 2e- = Cu(s)(Cathode) Cu(s) = Cu2+(aq) + 2e- The chemical reaction of nitrate d 'silver and copper during the electroplating process:2 AgNO3 + Cu → Cu (NO3)2 + 2 AgSilver nitrate (aq) also decays (g) when excited:2 AgNO3 → 2 Ag + O2 + 2 NO2There may be some sources of error in silver nitrate contamination and the amount poured into the plastic cup. Furthermore, another source of error could be the layer of copper coins, which is sometimes covered with different dirt and also does not allow the electroplating process..