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We will be investigating different factors in the simple chemical reaction of magnesium and hydrochloric acid. The reaction has an equation seen below:
The following pictures show the reaction, and try to explain what is happening.
The method we will be using for this experiment is shown in the diagram below. The video shows two different methods for showing the speed at which the reaction is taking place. We will be investigating the speed at which the reaction takes place if we change either:
the type of metal
the size of the metal pieces
the concentration of the acid
the temperature of the reaction (by changing the temperature of the acid)
Mr Trivino and Mr Faraha are showing the basic method in the following video. As an alternative to writing the Criterion B out during the write-up lesson, you could download the video, edit it, and provide your Criterion B by narrating the video (speaking over the video).
Unit 2 Crit B Introduction.mp4It would be better if you could make your own video.
Once you have agreed on your independent variable for the investigation, consider what other bits of video you may need to complete your Criterion B video.
After practicing the basic method of te experiment, your experiment (table) group should choose which independent variable you hope to investigate. In the next lesson you will write up an individual plan for your investigation.
In your groups you must decide what independent variable you will investigate.
Some of these may require changing the method you used to record the rate of this reaction.
Try to decide which you will investigate before the end of the first lesson, as on the second lesson in this process you will write an individual investigation plan.
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