Answer to Question #70396 in General Chemistry for Jessica

Question

Your teacher has provided 3 bottles labelled x,y and z. she tells you that each bottle contains the same acid, but at different concentrations. Your task is to design an experiment using another chemical to determine which bottles contain the strongest and weakest acids.

Answer 1

For the providing of experiment you need acid base indicator – bromothymol blue and the solution of NaOH. In three flasks you dilute the same amount of each acid. A small amount of indicator is then added into the flasks. And then you should add with pipette solution of NaOH into the flask and the amount of reagent used is recorded when the indicator causes a change in the color of the solution. For strongest acid, you need more solution of NaOH for neutralization and for weakest – less amount of solution NaOH.