7C learned the difference between strength and concentration today.
They had to find which acid was more concentrated
So they took 10ml of the acid and added universal indicator
They then used an alkali to neutralise it
The alkali was sodium hydroxide
They added alkali until the solution in the conical flask turned green
and then saw which acid used the most alkali.
and then saw which acid used the most alkali.
That one was the most concentrated.
Hydrochloric acid + sodium hydroxide => sodium chloride + water
