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TEACHERS EXPERIENCES FORM

Title of the Experience
Additional polarization of low polarized molecules in aqueous solution (HCl)
Name of the teacher
Nevenka Kostova
Country where it took place
Bulgaria
Thematic Area
Chemistry
Experience typology
Teaching in class
Type of contact
Direct
Description of the Experience
Two students relatively equal strong physically side-hold their hands and try to pull the other. Before that each student has chosen which atom of the molecule of HCl to present:
Student 1 - H atom
Student 2 - Cl atom
In the beginning there was no change in the position of students than small deviations. Then two other children, significantly stronger than the first, are included and catch the free hand of the first two and each pair of students pull in the opposite direction.
The second pair of students plays the role of water molecules (dipoles) which connect to H and Cl atoms of the molecule of HCl with their different poles. In this situation the relatively weaker students in the middle give out which explains breaking of the connection and the formation of free ions.

Comments on this Teachers Experience

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Date: 2014.10.29

Posted by Cristina Smirnov (Romania)

Very creative! Transferring the chemical reaction to a human level! Humanizing it! Imagining what this reaction would look like if it had people as main actors! This really helps students visualize the chemical reaction and integrate it in their way of thinking, that is understanding it!
I will use it!

Date: 2014.09.09

Posted by Laura Capella (Italy)

This experiment is very simple, so planning and performing it should be very easy. It is also engaging because students, at least some of them, are directly involved performing something on a stage. Obviously the interaction is not the same as the atom/molecule scale interaction but this can be explained later, when the attention is already captured. I think it is a pleasant experiment. I tired something similar in a class and it has been fun. I don't' know if it really worked to understand the subject but they really all do understand it quite well.

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