Introduction To Acids

Definition of Acids An acid is a compound that dissociates to produce hydrogen ions ($\text{H}^{+}$) when it is dissolved in water. The table below shows the names, formulae and dissociation reaction in water: Name of Acid Chemical Formula Equation Hydrochloric Acid $\text{HCl}$ $\text{HCl} \rightarrow \text{H}^{+} + \text{Cl}^{-}$ Sulphuric Acid $\text{H}_{2}\text{SO}_{4}$ $\text{H}_{2}\text{SO}_{4} \rightarrow 2 \text{H}^{+} + …

Read more

Acids, Bases & Salts

Sub-topics: Introduction to Acids Physical & Chemical Properties of Acids Introduction To Bases Physical & Chemical Properties of Alkalis pH Scale & Indicators Oxides Salts Preparation of Soluble Salts & Insoluble Salts Manufacturing Ammonia Properties & Uses of Ammonia & Ammonium Salts TBC Back To O Level Chemistry

Test For Oxidizing and Reducing Agents

The table below shows the common and important oxidizing agents: Oxidizing Agent Half Equation Colour change when added to reducing agent Application Acidified potassium manganate (VII)   $\text{KMnO}_{4}$ $\text{MnO}_{4}^{-} (\text{aq}) + 8 \text{H}^{+} (aq) + 5\text{e}^{-} \rightarrow \text{Mn}^{2+} (\text{aq}) + 4 \text{H}_{2}\text{O}(\text{l})$ Purple to pale pink (or colourless)  Used to test for reducing agent  Acidified …

Read more

Redox Reaction

A redox reaction is a reaction where reduction and oxidation take place at the same time. Oxidation reaction involves: Gain of oxygen Loss of hydrogen Loss of electrons Increase in oxidation number Reduction reaction involves: Loss of oxygen Gain of hydrogen Gain of electrons Decrease in oxidation number Reducing agent is the substance that: causes …

Read more