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 Form 4 Acids, Bases and Salts Topical Questions and Answers

(a) The elements nitrogen, phosphorous and potassium are essential for plant growth.
(i) Potassium in fertilizers may be in the form of potassium nitrate.
Describe how a sample of a fertilizer may be tested to find out if it contained nitrate ions.
(ii) Calculate the mass of nitrogen present if a 25kg bag containing pure ammonium phosphate ,
#(NH_4)_2HPO_4#. (N= 14.0, H=1.0, P=31.0,O=16.0)

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