.5 Strong and weak acids

• A strong acid is completely ionised in aqueous solution. Examples of strong acids are hydrochloric, nitric and sulfuric acids
• A weak acid is only partially ionised in aqueous solution. Examples of weak acids are ethanoic, citric and carbonic acids.
• For a given concentration of aqueous solutions, the stronger an acid, the lower the pH
• As the pH decreases by one unit, the hydrogen ion concentration of the solution increases by a factor of 10.