Today we tested out a fun method for producing a foam fire extinguisher.
We started by dissolving aluminium sulfate in the first beaker.
Then, in the second beaker, we dissolved sodium hydrogencarbonate.
After that, aluminium sulfate was transferred into a conical flask and we added a few drops of washing up liquid.
Lastly, sodium hydrogencarbonate was added to the conical flask and this is what we have observed:
