Plan for an electrolysis experiment to determine the relationship between the current and the amount of metal deposited at the cathode.
NAME : NABILA FATHA BINTI MOHD NOR MIMBAR
CLASS : M12G
TITLE : FACTOR AFFECTING THE ELECTROLYSIS
DATE : September 14, 2013
INTRODUCTION
Electrolysis is the decomposition of a molten or aqueous compound by electricity. The electrolysis process occurs only in liquids called electrolytes. If the electrolytes is in molten or aqueous state, there are presence of mobile ions which allow current to flow in the electrolyte. Thus, electrolyte can conduct electricity but not in solid state.
Example : Diagram below show the ions present in an electrolyte in different state.
AIM
RESEARCH QUESTION
There are many factors that affect the mass of metal deposited on the cathode which are surface area of electrodes, concentration of electrolyte, time, current and temperature. Thus, in this experiment, the current used in the electrolytic cell is chosen as the manipulated variable to determine the relationship between the current and the amount of metal deposited at the cathode. The selected type of electrode and electrolyte are copper and 1.0M copper (ii) sulphate solution.