In this activity students study the reaction between magnesium and hydrochloric acid using a pre-recorded video.
The reaction equation shows that a gas is produced. By measuring the amount of gas that is produced during a certain amount of time, the reaction rate can be determined. Students follow the rate of gas production by following the position of floating plastic balls in the collecting cylinder. By using the correct scaling, the moment of the balls can be correlated to a certain volume of gas. This scaling has already been prepared so that students can focus on the chemical aspects of this experiment.
Activity Magnesium and hydrochloric acid
In this activity students use the current and voltage sensors and investigate power delivered to a resistor by investigating the behavior of bulbs in a dc circuit.
Activity Intriguing behaviour of bulbs
In this activity students conduct a video measurement of the growth of the root and stem of a plant after germination. They analyse the growth curve of the plant and couple the growth speed to available energy.
Activity Plant growth