Electrochemistry – Definition

Terms and Definition Electronegativity Electronegativity is the tendency of the atom to receive electron to form negatively charged ion. Electropositivity Electropositivity is the tendency of the atom to release electron to form positively charged ion Conductor Conductor is a substance that can conduct electricity at solid or molten state without any chemical changes occur to … Read more

Voltaic Cell – Simple Cell

Simple Voltaic Cell A simple voltaic cell consists of two metal plates of different metals immerse in an electrolyte. The metal which is higher in electrochemical series will become the negative terminal. The atom of the metal which is higher in electrochemical series will release electron to form negative ions. The electrons are then move … Read more

Industrial Applications of Electrolysis

Extraction of Metals Diagram below shows the methods of extraction for different metals. Metals which are less reactive than carbon in reactivity series are extracted from their ore by displacement reaction using carbon. Copper and mercury can be extracted from their ore by burning directly in air. Silver (Ag) and gold (Au) need no extraction … Read more

Electrolysis of Aqueous Solution

Electrolysis of Aqueous Solution An aqueous solution is solution of water of a substance. For example, if you heat sodium chloride until it melts, it is called molten sodium chloride, but if you dissolve sodium chloride in water, it is called aqueous sodium chloride. Electrolysis of aqueous solution is different from electrolysis of molten electrolyte … Read more

Electrolytic Cell

The Electrolytic Cell Figure above shows an electrolytic cell. There are 2 electrodes in an electrolytic cell: The electrode connected to the positive terminal of the cell is positive electrode and is given a name, anode. The electrode connected to the negative terminal of the cell is negative electrode and is called the cathode. Electrolysis: … Read more

Electrolytes and Non-electrolyte

Electrolytes and Non-electrolyte A conductor is a substance which conducts electricity but is not chemically changed during the conduction. Electrolytes are compounds that can conduct electricity in molten or aqueous solution. Examples of electrolytes are acids, alkalis and salts dissolved in water or molten salts. All these are ionic substances. A non-electrolyte is a liquid … Read more

SPM Form 4 Chemistry Chapter 6 – Electrochemistry

Revision Notes 6.1 Electrolytes and Non-Electrolytes6.2 Electrolytic Cell6.3 Electrolysis of Aqueous Solutions6.4 Industrial Applications of Electrolysis6.5 Voltaic Cell Videos Electrolysis Electrolysis of Aqueous Solution Electrochemical Series Electrolysis of Aqueous Sulphuric Acid Factors Affecting the Selective Discharge Electrolysis of Copper (II) Sulphate Extraction of Metals Extracting Sodium Extracting Aluminium Electroplating – Part 1 | Part 2 | Part 3 Daniell Cell … Read more