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Unit 3 assessment O1
Analysis of fertiliser-an extended experimental investigation

Background:
In this investigation you will analyse the composition of a lawn fertiliser, or ‘lawn food’.

You may use external sources to help you complete the this section.

Q1. Why is each of the elements Nitrogen, Phosphorus, sulfur and iron included in lawn food?

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Q2. What distinguishes gravimetric analysis from other forms of analysis?
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Q3. Briefly describe the process of volumetric analysis.
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Q4. Explain the chemical principle involved in spectroscopic techniques in general and specifically in colorimetry.
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Q5. In this assessment you will analyse the iron content of the fertiliser using a redox titration. Describe another way an analysis for iron could be performed.
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