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Acid And Base
- 1. ACID AND BASE Meaning: An acid is a chemical substance which ionises in water to produce hydrogen ions, H + or hydroxonium ion, H 3 O + . A base is a chemical substance which reacts with acid to produce salt and water A alkali is a chemical substance which ionizes in water to produce hydroxide ions, OH - Faridah Hamat SASER 2008
- 13. USES Faridah Hamat SASER 2008 Uses of acids Uses of bases and alkalis * Make industrial products such as paints, detergents, fertilizers. * Food preservative such as vinegar, citric acid and ascorbic acid. * Electrolyte in lead-acid accumulator. * Use as laboratory reagents * Make soaps, shampoos and detergents. * Make several of medicines, such as antacid and aspirin. * Use as laboratory reagents
- 14. Molarity (mol dm -3 ) = Number of Mole Volume, dm 3 Example: Calculate the molarity of 0.4 moles sulphuric acid in 250cm 3 solution. Solution : Number of mole = MV 1000 Molarity = number of mole x 1000 = 0.4 x 1000 250 250 = 1.6 mol dm -3 CONCENTRATION Faridah Hamat SASER 2008