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Fertilizers - PowerPoint PPT Presentation

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Fertilizers. Today’s Lesson. Fertilizers Your Experiment Gases Poster. What Plants Need. Plants need more than water and sunlight to be healthy. They also need Nitrogen (N) and Potassium (K). Nitrogen is needed for strong stems and healthy leaves

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Today s lesson
Today’s Lesson

  • Fertilizers

  • Your Experiment

  • Gases Poster

What plants need
What Plants Need

  • Plants need more than water and sunlight to be healthy.

  • They also need Nitrogen (N) and Potassium (K).

  • Nitrogen is needed for strong stems and healthy leaves

  • Potassium helps plants survive frost and to resist disease.

  • Plants normally absorb or take in Nitrogen in the form of Nitrate (NO3) and Ammonia (NH3) ions.


  • There are a couple of ways that fertilizers are made naturally. They are:

    • Lightning strikes react Oxygen and Nitrogen in the air and brings Nitrogen Oxides to the soil

    • Animals manure and urine may contain nitrates which breaks down to ammonia

    • Some bacteria are nitrogen-fixing. So are some plants. The legume family (such as peanuts and soybeans) fix nitrogen into the soil

A little more detail
A Little More Detail

  • A fertilizer is any substance added to soil to make it more fertile. The main types of fertilizers are:

    • Ammonium Nitrate (NH4NO3)

    • Ammonium Sulfate (NH4)2SO4

    • Potassium Sulfate K2SO4

    • Ammonium Sulfate (NH4)2PO4

  • Fertilizers that provide nitrogen are called nitrogenous fertilizers

From ammonia to nitric acid
From Ammonia to Nitric Acid

  • Step 1: Ammonia (NH3) is mixed with the air and passes over a heated catalyst to form Nitrogen Monoxide (NO)

  • 4NH3 (g) + 5O2 (g) 4NO (g) + 6 H2O

  • Step 2: NO is cooled and more air is added to make Nitrogen Dioxide

  • 2NO (g) + 02 (g)  2NO2 (g)

  • Step 3: More air is added and mixed with water to make Nitric Acid

  • 4NO2 (g) + O2 (g) + 2H2O (l)  4 HNO3 (aq)


  • Nitric Acid + Ammonia  Ammonia Hydroxide

  • HNO3 (aq) + NH3 (aq)  NH4NO3 (aq)

  • Sulfuric Acid and Ammonia can also make Ammonium Sulfate

  • Sulfuric Acid + Ammonia  Ammonium Sulfate

  • H2SO4 (aq) + 2NH3 (NH4)2SO4 (aq)


  • Read Page 160-161 and answer Q 1-8

  • Then start experiment

  • Then complete Gas Poster

Gases are great
Gases Are Great!!

  • For this exciting activity, we will be completing an A3 poster on one of the following gases: (choose one)

    • Nitrogen

    • Argon

    • Oxygen

    • Carbon Dioxide

    • Ozone

    • Sulfur Dioxide

    • Water Vapor

Include the following
Include the following:

  • Who found your gas? When was it found?

  • Draw an electron dot diagram for your gas

  • Include basic information about your gas (MP, BP, Ar/Mr, amount found in atmosphere, etc)

  • Explain the cycle on earth for your gas (including diagram)

  • What is your gas used for in Industry? Explain giving examples


  • Is your gas need or harmful to living organisms? Explain.

  • How can industry get your gas in a pure form?

  • Does your gas cause any problems (for industry or living things)??

  • Anything else of interest

  • A simple bibliography