Making fertilizers in the lab

• Why must you treat a phosphate rock first before using it as fertiliser?

  As rocks are insoluble so plants can't absorb the compounds
• Nitrates help with growth of healthy leaves
• Phosphates help with growth of healthy roots
• Potassium helps with growth of healthy leaves and flowers
• Ammonium Sulfate fertiliser practical process:

  1. Use a pipette to put ammonia solution in a conical flask
  2. Add dilute sulfuric acid 1cm^3 and swirl
  3. Dip glass rod into solution and place on blue litmus paper
  4. Repeat step 2 and 3 again till paper turns green
  5. Pour Ammonia sulfate into evaporating basin and allow to crystallise
• What type of reaction is made when making fertilisers?

  A neutralisation reaction