10.1.3: The reactions between metals and dilute acids
E-assessement - B1: Periodic Table:
A discussion of the reason why water reacts with metals.
The dissociation of water leads to the water having a low concentration of hydrogen ions that can accept electrons from the metal atoms, making metal ions. This is a redox reaction; transfer of electrons between species.
M(s) + 2H+(aq) M2+(aq) + H2(g)
The students are to carry out an experiment to investigate the reaction of several metals with dilute acids.
They are provided with:
There are several observations to be made
Teacher lead design encouraging the students to observe the reactions of the six metals with the three acids using the hypothesis:
"Acids release more hydrogen ions than water, therefore they will react with metals more vigorously than water."
Experiment report: The students should address the following questions:
Criteria B & C