Introduction to Acids, Bases and Salts Classification of matter On the basis of a) composition – elements, compounds and mixtures b) state – solids, liquids and gases c) solubility – suspensions, colloids and solutions Types of mixtures – homogeneous and heterogeneous Types of compounds – covalent and ionic What Is an Acid and a Base? Ionisable and non-ionisable compounds An ionisable compound when dissolved in water or in its molten state, dissociates into ions almost entirely. Example: NaCl, HCl, KOH, etc. A non-ionisable compound does not dissociate into ions when dissolved in water or in its molten state. Example: glucose, acetone, etc. Examples Acids • Hydrochloric acid (HCl) • Sulphuric acid (H2SO4) • Nitric acid (HNO3) Bases • Sodium hydroxide (NaOH) • Potassium hydroxide (KOH) • Calcium hydroxide (Ca(OH)2)