Topic: Ammonia

Target group

High school / technical school student

Core curriculum:

New core curriculum:

High school and technical high school. Chemistry – basic level:

VII. Systematics of inorganic compounds. Pupil:

6) classify hydrides due to their chemical nature (acidic, basic and neutral); conclusions of the chemical nature of hydride based on the results of the experiment; writes appropriate reaction equations confirming the chemical nature of hydrides; describes typical chemical properties of the 17th group hydrides, including their behavior towards water and rules.

XVIII. Nitrogen‑containing organic compounds. Pupil:

2) compares the structure of ammonia and amines; draws electronic patterns of ammonia molecules and methylamine;
4) compares and explains the reason for the basic properties of ammonia and amines; writes appropriate reaction equations.

High school and technical high school. Chemistry – extended level:

VII. Systematics of inorganic compounds. Pupil:

6) classify hydrides due to their chemical nature (acidic, basic and neutral); designs and carries out an experiment whose course will demonstrate the chemical nature hydride; conclusions of the chemical nature of hydride based on the results of the experiment; writes appropriate reaction equations confirming the chemical nature of hydrides; describes typical chemical properties of the 17th group hydrides, including their behavior towards water and rules.

XVIII. Nitrogen‑containing organic compounds. Pupil:

2) compares the structure of ammonia and amines; draws electronic patterns of ammonia and amine molecules (e.g. methylamine);
4) compares and explains the reason for the basic properties of ammonia and amines; writes appropriate reaction equations;
5) writes reaction equations for obtaining aliphatic amines (e.g. in the process of alkylation of ammonia) and aromatic amines (e.g., preparation of aniline as a result of a nitrobenzene reduction reaction).

Old core curriculum:

High school and technical high school. Chemistry – basic level:

XVIII. Organic compounds containing nitrogen. Student:

1) describes the construction and classification of amines;
2) compares the construction of ammonia and amines; draws electron patterns of ammonia and methylamine molecules;
3) points to differences and similarities in the structure of methylamine and phenylamine (aniline);
4) compares and explains the reason for the basic properties of ammonia and amines; writes relevant equations of reaction.

General aim of education

The student describes the structure and properties of ammonia

Key competences

• communication in foreign languages;

• digital competence;

• learning to learn.

Criteria for success
The student will learn:

• what is ammonia;

• which physical and chemical properties have ammonia;

• where this relationship is used;

• how this relationship works on the human body and why we should be careful in contact with it.

Methods/techniques

• expository

  • talk.

• activating

  • discussion.

• exposing

  • exposition.

• programmed

  • with computer;

  • with e‑textbook.

• practical

  • exercices concerned;

  • experiment.

Forms of work

• individual activity;

• activity in pairs;

• activity in groups;

• collective activity.

Teaching aids

• e‑textbook;

• notebook and crayons/felt‑tip pens;

• interactive whiteboard, tablets/computers.

Lesson plan overview

Introduction

1. The teacher hands out Methodology Guide or green, yellow and red sheets of paper to the students to be used during the work based on a traffic light technique. He presents the aims of the lesson in the student's language on a multimedia presentation and discusses the criteria of success (aims of the lesson and success criteria can be send to students via e‑mail or posted on Facebook, so that students will be able to manage their portfolio).

2. The teacher together with the students determines the topic – based on the previously presented lesson aims – and then writes it on the interactive whiteboard/blackboard. Students write the topic in the notebook.

Realization

1. The teacher informs the students that in nature an organic substance (e.g. leaves after falling in autumn, plant residues, dead animals, etc.) undergoes decomposition processes (rotting, rotting) resulting in an inorganic compound - ammonia. It can also be obtained as a result of strong bases activity for ammonium salts, e.g. ammonium chloride (for laboratory purposes). For industrial purposes, ammonia is obtained directly from the elements.

2. The students consolidate the acquired information, discussing it with their nearest neighbors („tell your neighbor” method).

3. The teacher asks students to prepare an observation log in an abstract (or notebook) and informs them that they will carry out the experiment „Testing the selected properties of ammonia”. They are to write down a research question, hypotheses, and then also observations and conclusions along with a summary. The experiment will let students to learn the following properties of ammonia: physical state, color, solubility in water. They will also examine the pH of the aqueous solution of ammonia. Students should note all these features.

4. The teacher conducts a demonstration „Testing the electrical conductivity of an aqueous ammonia solution”. As before, students formulate a research question and hypotheses, write them down in the observation log. They note their conclusions.

5. The teacher asks students to do an interactive exercise in the abstract.

Summary

1. The teacher asks the students to finish the following sentences:

   • Today I learned ...

   • I understood that …

   • It surprised me …

   • I found out ...

   The teacher can use the interactive whiteboard in the abstract or instruct students to work with it

Homework

1. Listen to the abstract recording at home. Pay attention to pronunciation, accent and intonation. Learn to pronounce the words learned during the lesson.

2. Make at home a note from the lesson using the sketchnoting method.

The following terms and recordings will be used during this lesson

Terms

Texts and recordings

Ammonia

During the decomposition process of protein substances an unpleasant odor is released. One of the products is well‑known hydrogen sulfide smelling of rotten eggs. Another resulting gas with an equally unpleasant smell is ammonia – an inorganic compound with the formula $\text{N}{\text{H}}_{\text{3}}$.

• Ammonia is an inorganic compound with the formula NHIndeks dolny 3₃

• It is a gas with an unpleasant odor.

• The ammonia solution conducts electricity.