Topic: The use of sulphates, phosphates and chlorides

Target group

Elementary school student (grades 7. and 8.)

Core curriculum:

Primary school. Chemistry.

VII. Salts. Student:

6) lists the application of the most important salts: chlorides, carbonates, nitrates(V), sulphates(VI) and phosphates(V) (orthophosphates(V)).

General aim of education

The student mentions the use of sulphates, phosphates and chlorides

Key competences

• communication in foreign languages;

• digital competence;

• learning to learn.

Criteria for success
The student will learn:

• recognize salts found in common use and assess their impact on the natural environment.

Methods/techniques

• activating

  • discussion.

• expository

  • talk.

• exposing

  • film.

• programmed

  • with computer;

  • with e‑textbook.

• practical

  • exercices concerned.

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. In the previous lesson, the teacher instructed students as homework to prepare for the subject „Application of phosphates, sulphates and chlorides” using various sources of knowledge, including e‑textbook and abstract.

2. The teacher uses the 525 technique, where:
   5 - means the number of people or groups
   2 - means the number of ideas and solutions
   5 - indicates the number of changes (rounds).

3. The teacher writes down the problems to be solved on the board:
   What are the uses of phosphates?
   What are the uses of sulphates?
   What are the uses of chlorides?
   Each problem is also saved on 3 different sheets of paper.

4. The teacher divides the students into 5 groups. Explains the rules of work. Each group types 2 suggestions for solving the problem on the sheet. Students write ideas, but be careful not to repeat the suggestions of colleagues. After saving 2 ideas, each group passes the sheet to the neighboring team in a clockwise direction. The teacher determines the moment of handing over the sheets. A sheet with phosphates, sulphates and chlorides must be added to each group in order for new solutions to be noted.

5. After finishing the work, the sheets are hung on the wall - the groups evaluate the saved proposals; the teacher invites you to the discussion.

6. The teacher teaches students to abstract and asks for interactive exercises.

7. The teacher asks students to familiarize themselves with the material concerning the next lesson - „The influence of salt on the natural environment”, using the information contained in the e‑textbook and available other sources.

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

2. The student indicated by the teacher sums up the lesson, telling what he has learned and what skills he/she has been practicing.

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

The use of sulphates, phosphates and chlorides

• Salts occur in nature in a dissolved form in natural waters or form minerals

• Nitrates and phosphates are used, among others for the production of synthetic fertilizers.

• Calcium carbonate is, for example, a raw material for the production of building materials.

• Sodium chloride is used, among others for food, in the pharmaceutical industry and for snow‑covered streets in winter.

sulphates, chlorides, phosphates, application of salt