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Chemical Processes · Part 3 of 4
3 exam-style questions with model answers, plus 4 quick multi-choice questions — every question on this part of the standard, grouped by the 1 page of notes they come from.
Write a full answer before you reveal the model one. That comparison is where the learning happens.
Give an account of how nitrogen applied as urea fertiliser becomes nitrate in soil, including equations and the oxidation numbers of nitrogen.
Explain why nitrate leaches into groundwater while ammonium largely does not, and explain the consequences of that leaching for people and for waterways.
Evaluate the impact of nitrogen fertiliser use in New Zealand, comparing and contrasting the benefits of the chemistry with the issues it has created, and analysing the options for response.