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Ammonium Nitrate - Efficient Fertilizers

Written for PULSE by Christopher Martin
Edited By: Stephanie Nardei



Time: 1 class period
Preparation
Time:

20 minutes to print articles for students and load PowerPoint

Materials:

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Abstract
During this exercise, students will learn that ammonium nitrate is used as a fertilizer and an explosive. They will study the chemistry of ammonium nitrate and consider the advantages and disadvantages of this compound. The dual nature of Ammonium Nitrate was illustrated by the Grandcamp disaster in 1947.

Objectives
Students will be able to:

  1. Compare different fertilizers and understand their world wide use.
  2. Calculate the molar mass and percent nitrogen in the different fertilizers.

National Science Education Standard
Content Standard D: The Physical Setting

The structure of Matter

The configuration of atoms in a molecule determines the molecule's properties.

Strand 5: Physical Science
Concept 4: Chemical Reactions
Investigate relationships between reactants and products in chemical reactions.
PO 6.   Solve problems involving such quantities as moles, mass, molecules, volume of a gas, and molarity using the mole concept and Avogadro’s number.

Teacher Background
Fertilizers are added to the soil to increase the vital nutrients that support plant growth. Nitrogen is the most important of these nutrients.

Related and Resource Websites
The Mole Table of Contents http://dbhs.wvusd.k12.ca.us/webdocs/Mole/Mole.html

PULSE Resource Page on Fertilizers http://pulse.pharmacy.arizona.edu/resources/fertilizers/teachers.htm 

 

stoichiometry

 

 


Activity

1. Read Efficient Fertilizers .Use a table to record the name of the fertilizer, date first used and consumption with recent date.

2. Percent Composition by mass

Calculate the Mass percent of nitrogen in each of the fertilizers from “efficient fertilizers”.

NH4NO3

Molar Mass = (2x14) + (4 x1) + (3x16) =80

 Mass % = (2x14) / 80  x 100 = 35%

Efficient Fertilizers

  1. Name

    Formula

    % N

    Comsumption (date)

    Production / source

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Embedded Assessment
Completion of the worksheet will demonstrate understanding.

 

 

 


PULSE is a project of the Community Outreach and Education Program of the Southwest Environmental Health Sciences Center and is funded by:


an
NIH/NCRR award #16260-01A1
The Community Outreach and Education Program is part of the Southwest Environmental Health Sciences Center: an NIEHS Award

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LOGO - NIEHS Center LOGO - NIEHS

Supported by NIEHS grant # ES06694


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