The Rate of Electrolysis Of Copper Chloride Solution

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The Rate of Electrolysis Of Copper Chloride Solution


We are going to find out what things affect the rate of Electrolysis

and to find this out we will use Copper chloride salt dissolved in

water to form a solution. The salt is dissolved in water

becausechemical compounds when in a molten state or when dissolved in

water exist in the form of ions that are capable of movement, meaning

their molecules become dissociated into positively and negatively

charged components, which have the property of conducting an electric

current. A compound that conducts when molten or in solution is called

an electrolyte.

When some substances dissolve they change slightly, their atoms are no

longer neutral, neither positive nor negative. The negative atoms lose

their electrons so the atoms become positive. These particles are no

longer known as atoms but ions. The positive ions are called anode.

The negative ions are called cathode. These electrons only dissolve in

water. Because they have enough room to move this then lets the

reaction take place.

Equation CuCl2 [IMAGE]Cu+2 + 2Cl-1

If a pair of electrodes is placed in a solution and a source of direct

current is connected between them, the positive ions in the solution

move towards the negative electrode (cathode), and the negative ions

move towards the positive electrode (anode). On reaching the

electrodes, the ions may gain or lose electrons and be transformed

into neutral atoms or molecules.

The copper ions move to the cathode and are discharged by gaining

electrons, and are deposited on the electrode as metallic copper,

Equation Cu+2 + 2e- èCu (Reduction)

The chloride ions move to the anode and are discharged, by losing

electrons, as chlorine gas.

Equation 2Cl-1è Cl-1 + 2e-(Oxidation )


Here is a diagram to show the ions going to the electrodes


I think that in the solution the more electrons flowing the more you

have a chance of seeing a better chemical reaction taking place. The

more current flowing the quicker the reaction and if the solution is

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