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Fertilizers and testing for nitrates.

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Introduction

´╗┐Fertilizers Mined inorganic fertilizers have been used for many centuries, whereas chemically synthesized inorganic fertilizers were only widely developed during the industrial revolution. Increased understanding and use of fertilizers were important parts of the pre-industrial British Agricultural Revolution and the industrial Green Revolution of the 20th century Fertilizers (also spelled fertilisers) are compounds given to plants to promote growth; they are usually applied either via the soil, for uptake by plant roots, or by foliar feeding, for uptake through leaves. Fertilizers can be organic (composed of organic matter), or inorganic (made of simple, inorganic chemicals or minerals). They can be naturally occurring compounds such as peat or mineral deposits, or manufactured through natural processes (such as composting) or chemical processes (such as the Haber process). Fertilizers typically provide, in varying proportions, the three major plant nutrients (nitrogen, phosphorus, and potassium), the secondary plant nutrients (calcium, sulfur,magnesium), and sometimes trace elements (or micronutrients) with a role in plant nutrition: boron, chlorine, manganese, iron, zinc, copper, and molybdenum. ...read more.

Middle

and potassium (K). These three essential elemental nutrients should naturally occur in healthy soil, but some plants require more of them. Other chemicals that might be included in inorganic fertilizers include calcium, sulfur, iron, zinc and magnesium. Investigation Table of Results Substance Flame Test Sodium Hydrioxide test Litmas test Silver nitrate test Barium nitrate test Brown ring test A no observable change. no observable change. Red to blue No reaction no observable change. Brown B no observable change. no observable change. Red to blue no observable change. White precipitate no observable change. C Green no observable change. no observable change. no observable change. White precipitate no observable change. D Brick Red no observable change. no observable change. no observable change. no observable change. Brown E Lilac no observable change. no observable change. no observable change. White precipitate no observable change. F Lilac no observable change. no observable change. White precipitate no observable change. no observable change. Method Flame Test First dip a wooden splint into each of the sample of solution, then the colour of a gas flame is observed as the sample is heated by the Bunsurn Burner. ...read more.

Conclusion

White precipitate no observable change. Calcium Nitrate Brick red no observable change. no observable change. no observable change. no observable change. Brown Potassium Sulphate Lilac no observable change. no observable change. no observable change. White precipitate no observable change. Potassium Chloride Lilac no observable change. no observable change. White precipitate no observable change. no observable change. Risk Assessment When doing the brown ring test eye protection must be worn,However it is a low risk experiment if proper precautions are taken and the instructions are adhered to. Wear lab gloves andeye protection. Specific activity Hazards/consequences Control measures silver nitrate silver nitrate is CORROSIVE,gets on your skin or Causes burns to skin, eyes and body tissues. Eye contact causes damage which may result in permanent loss of vision. Eyes:Wear appropriate protective eyeglasses Skin:Wear appropriate gloves to prevent skin exposure. Open flame Fire, burns Fire extinguisher, hair tied back Barium nitrate Eye:Causes eye irritation. Skin:Causes skin irritation. May be harmful if absorbed through the skin. Eyes:Wear appropriate protective eyeglasses Skin:Wear appropriate gloves to prevent skin exposure. Clothing:Wear a chemical apron. Wear appropriate clothing to prevent skin exposure. Also when doing tests like these strick hygiene is needes for example wash hands after doing the experiment, cover cuts ect. ...read more.

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