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What does a fertiliser contain to make plants grow? How do they get into the plant? Suggest the properties a fertilis PowerPoint Presentation
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What does a fertiliser contain to make plants grow? How do they get into the plant? Suggest the properties a fertilis - PowerPoint PPT Presentation

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What does a fertiliser contain to make plants grow? How do they get into the plant? Suggest the properties a fertilis
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  1. What does a fertiliser contain to make plants grow? • How do they get into the plant? • Suggest the properties a fertiliser must have.

  2. Plants absorb minerals through their roots Soil particles N K P K

  3. rock sulphuric super phosphate phosphate acid (insoluble) (soluble) Rock phosphate (calcium phosphate) is insoluble. By reacting it with sulphuric acid converts it to a more soluble form (super phosphate).

  4. Making Fertiliser 2NH3(aq)  H2SO4(aq)(NH4)2SO4(aq) Fertilisers containing nitrogen are vital for the healthy growth of plants. One of the commonest nitrogen compounds is the gas ammonia (NH3). In this experiment you will make a solid fertiliser, ammonium sulphate, by reacting sulphuric acid with ammonia solution.

  5. Analysis 1 Write a word equation for the reaction that has taken place. 2 What type of reaction takes place when an acid reacts with an alkali? 3 Before you started heating, did the mixture contain excess acid or excess ammonia? 4 What happened to this excess when you heated the mixture? 5 Why would it have been a greater safety hazard if you had evaporated the mixture when the pH was still below 7? 6 If you carry on heating until all the water has boiled away: a what safety hazard(s) might be introduced b how would the product look different from the crystals that can be formed?