Question

Chlorine can be made by the electrolysis of concentrated aqueous sodium chloride.
The overall process can be represented by the following equation.
55 dm² of 3.5 mol/dm aqueous sodium chloride is electrolysed.
(c)
2NaCl(aq) + 2H2O
2NaOH(aq) + Cl2ig) + H2(g)
What is the maximum volume of chlorine that can be formed, measured at room temperature
and pressure?

Answer 1

Answer:

The amount of material in moles formed at the electrode in electrolysis depends on three factors.

• The quantity of any product produced from electrolysis, and its rate of production, depends on the number of electrons that are transferred in the external circuit and how fast the electrons flow in the circuit.
• The charge on the ion - the bigger the charge on the ions, the more electrons must be transferred to give one mole of the product compare the effect of one mole of electrons in the table above and see examples 13.1.1 to 13.1.5 below in Part one)
• The current flow, current is the rate of flow of charge, the higher the current flow (in amps), the more electrons are transferred per unit time e.g. seconds (the current flowing in amperes). Therefore, the rate of product formation is proportional to current.
• The time duration of the electrolysis, the longer the electrolysis runs for, the more product is formed. Therefore, the amount of product formed is proportional to time.

If you know how much of a substance is made at one electrode, you can theoretically calculate the amount of substance formed at the other electrode.

The basis of these calculations is the ratio of the electrons involved in both electrode reactions (hence the introductory table of electrode equations above).

hope it helps you...