Each indicators change colours at a different and unique pH . An Acid-Base Titration is the analytical technique in Volumetric Analysis , where an acid of known concentration is used to neutralise a known volume of a base, and the observed volume of the acid required is used to determine the unknown concentration of the base. Acyl chlorides, have the general formula R.CO.Cl. In systemically naming acyl halides the names end with the suffix -oyl, e.g. ethanoyl chloride CH 3 COCl. The acidic oxides are the oxides of the non-metal elements.
Most acidic oxides are soluble in water and react with it giving acids in solution.
For example, sulphur trioxide reacts with water to produce sulphuric acid. All acidic oxides react with alkalis to give salt and water only. For example, sulphur trioxide reacts with sodium hydroxide in aqueous solution to produce sodium sulphate and water. Similarly, nitric oxide reacts with sodium hydroxide in aqueous solution to produce a mixture of sodium nitrate, sodium nitrite and Water. Acid Rain Acid Rain results from the burning of fossil fuels containing sulphur, when sulphur dioxide is produced during the combustion process.