We are from group 7 and our group consists of 4 members, they are Ja Ja, Chai Wei, Unshin and Mi Ja Sin. We are now going to present our topic which is Electroletic Cell. Electroletic Cell is a cell used electrical energy which is external voltage source to dry and non-spontaneous redox reaction. So it changed electrical energy to chemical energy. Electroletic Cell contains 3 elements which is 1 electrode light and 2 electrode. For which anode is positive electrode, it undergoes oxidation and cathode is negative electrode in other goal reduction. Only for an external electrical potential of the correct polarity and large enough magnetude, electrolytic cell can decompose a normalist stable or in a chemical compound in the solution. I am going to talk about the electrolysis process. For example, the electrolysis of hydrochloric acid HCl. Chemically, the favorite reaction at the anode would be the oxidation of hydrogen gas and the reduction of chlorine gas at the cathode. The hydrogen gas is oxidized to 2 hydrogen ions plus 2 electrons at the anode. For the chlorine gas is reduced to 2 chlorion at the cathode. The overall reaction of this process is H2 plus Cl2 to 2 HCl. The cell notation of the electrolysis of HCl is written as below. Cell notation is a shorthand method of expressing a reaction in an electrochemical cell. In cell notation, the anode is placed on the left while the cathode is placed on the right. Individual solid, liquid or equals phases within each half cell are written separated by a single bar. The electro-mode force of this process at standard condition, e.node, is equal to 1.36 If H2 and Cl2 gases are barbed over the two electrons, HCl is produced. Next, when the cell is set up with a power supply with voltage more than 1.36V, the reverse reaction would occur. This means that the hydrogen gas and chlorine gas will be formed. In the diagram below, the positive hydrogen ions H plus from hydrochloric acid are attracted to the negative cathode. The H plus ion are reduced by the electron skin to form hydrogen gas at the negative electrode. Note that all acids give hydrogen at the negative cathode. The positive and not attracts both the hydroxide ions, OH- from water and chloride ions, Cl- from hydrochloric acid. Not only the chloro ions is discharged in the appreciable quantities. Chloro ions are oxidized by the electrons lost to form chlorine gas at the positive electrode. We can demonstrate the electrolysis of hydrochloric acid using the HV-V-A-Meter eston in the video. This is one of the common questions in electrolysis process. Why is the bridge not used in the process? This is because both anode and cathode are added in the same solution, which is hydrochloric acid. Next, decomposition potential. Decomposition potential is the minimum electron motif force to be applied between the solution and electrode to bring about continuous discharge of the ions. The reverse reaction, the reduction of H plus by Cl, is thermodynamically non-spontaneous. It will occur only with an input of more than 1.36V from an external power supply. This is often more than cell voltage due to kinetic or surface effects. This is called as over potential, the difference between the theoretical cell voltage and the extra voltage that is necessary to cause electrolysis. However, it is impossible to reverse a reaction due to the side reactions sometimes. For example, the reaction of zinc and copper. We cannot get zinc to play up if we are done in a quiz solution. This is because H2O, the water, breakdowns first to give H2 rather than the zinc. Now I would like to talk about advantage and disadvantage of electrolytic cell. First of all, the advantage of electrolytic cell. For this topic, I'll talk more on the application part. First, the production of hydrogen gas by water electrolysis. Hydrogen gas can produce a powerful nearly-clean source of energy. Furthermore, hydrogen gas produced can directly use for fuel cell and industrial application. The figure 1 shows the electrolytic cell for water electrolysis. The hydrogen gas is produced at the cathode, which the hydrogen ions is reduced by received electron to form hydrogen gas. Second, production of having water by prolonged water electrolysis. Having water produced can use in nuclear reactor. The figure 2 shows the attraction of having water by prolonged water electrolysis. The electrolysis process was stored until the water became pure heavy water. The third advantage is the use of electrolytic cell in electro-metallogic process. Electro-metallogic involves the metallurgical process, take place in form of electrolytic cell. The electro-metallogic process categorizes into form and group, which is electro-winding, electro-winding, electro-plating and electro-forming. For electro-winding process, it is used to attract the metal. Well, electro-winding process is used to purify the metal. Both of these process can produce a very high-perity of metal that is at 29.99%. For electro-plating process, it can improve the appearance of metal surface, increase the corrosion and ablation resistivity of metal. For electro-forming process, it can perform an ultra-position processing, which can obtain a good replication accuracy. Next, it's advantage of electrolytic cell. First, greenhouse gases emission. The energy used to generate electricity in the electrolytic cell is harnessed from fossil fields which will cause greenhouse gas emission. Second, electrical hazard. The electrical hazard arises from the fact that the electro-metallogic plants and plating short-operate-bible direct and alternating currents, and the third is the high cost. Of course, this is really this. So for the industrial, who wish to use the electrolytic cell to perform electrolysis process need to bear a burden on the high-energy cost, high-mantanon cost and disposal cost. It makes a time time. That's all from us. Thank you for watching.