The chemical industry

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Grade 12 summary presentation for science: chapter 14: the chemical industry.

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The chemical industry

  1. 1. 1 Everything Science www.everythingscience.co.za 14. The chemical industry Chemistry Grade 12
  2. 2. 2 Everything Science www.everythingscience.co.za Introduction The growth of South Africa’s chemical industry was largely due to the mining industry, which requires explosives for their operation. One of South Africa’s major chemical companies is Sasol. Other important examples of chemical industries in the country are the chloralkali and fertiliser industries. Fertilisers and nutrients The fertiliser industry is very important in providing fertilisers with the correct nutrients in the correct quantities to ensure maximum growth for various plants and crops. All plants need certain macronutrients (e.g. carbon, hydrogen, oxygen, potassium, nitrogen and phosphorus) and micronutrients (e.g. iron, chlorine, copper and zinc) in order to survive. Fertilisers provide these nutrients. In plants, essential nutrients are obtained from the atmosphere or from the soil. Animals also need similar nutrients, but they obtain most of these from plants or plant products. They may also obtain them from other animals, which may have fed on plants during their life. Organic fertilisers are made from natural products, like manure or compost. Inorganic fertilisers refer to industrially produced compounds.
  3. 3. 3 Everything Science www.everythingscience.co.za Fertilisers contd. Fertilisers can be produced industrially using a number of chemical processes.
  4. 4. 4 Everything Science www.everythingscience.co.za For more practice see: everythingscience.co.za Shortcode: ESCSV

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