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Paragraph 7 EXPRESSION OF RESULTS

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Determine the quantity of sulfuric acid consumed.

  • 1 ml 0.05 M sulfuric acid = 0.0014 g nitrogen.

  • 1 ml 0.1 M sulfuric acid = 0.0028 g nitrogen.

  • 1 ml 0.25 M sulfuric acid = 0.0070 g nitrogen.

Express the result as the percentage of nitrogen (N) contained in the fertiliser as received for analysis.