Water 3: Detect invisible substances in water 1 (student instructions)
Text
Experimentation instructions for students in grades 5, 6, and 7:
Detailed instructions and questions for students on conducting the third subexperiment on water quality. The presence of dissolved substances is verified by determining the pH value.
Englisch, Spanisch (CREA), Deutsch
12.08.2016
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The students will measure the pH value of water as well as of water with citric acid and water with washing soda. They will learn the terms alkali and acid.
The instructions first include a photo and a list of the required apparatus and materials. Text and pictures explain the preparations for the experiment step by step. Then several assignments are presented: The students should express their guesses, conduct the experiment, and note down their observations.
Information and ideas:
• Observe the safety information in these instructions as well as in the teacher information related to the experiment and discuss them with your students.
• Also observe the applicable safety guidelines for your school.
The instructions first include a photo and a list of the required apparatus and materials. Text and pictures explain the preparations for the experiment step by step. Then several assignments are presented: The students should express their guesses, conduct the experiment, and note down their observations.
Information and ideas:
• Observe the safety information in these instructions as well as in the teacher information related to the experiment and discuss them with your students.
• Also observe the applicable safety guidelines for your school.
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Experiment
Chemistry; Physics
Grade 5 to 6
Middle/high school
Acids; Base (chemistry); Drinking water; Water pollution; Water treatment
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Michael Knieb, Alexander Ruß for the Siemens Stiftung
© Siemens Stiftung 2016
