Don’t forget you have a digestion test tommorow. Do some study whilst you are waiting. Do now!. Last lesson. Measuring the strength of acids and alkalis The pH scale Using “Universal Indicator”. The pH scale. strong acid. pH stands for the “ potential of hydrogen ”. weak acid.
Don’t forget you have a digestion test tommorow. Do some study whilst you are waiting.
pH stands for the “potential of hydrogen”
To measure pH, we need an indicator that has a different colour for each value of pH
It comes in the form of a paper
It also comes in the form of a liquid
You are now going to measure the pH of various acids, alkalis and household liquids.
Your task is to produce the colours of the rainbow in 6 test tubes using only Universal Indicator liquid and the acids and alkalis provided.
The first group to succeed will receive 3 house marks each
Don’t forget safety glasses!
Use SMALL amounts – it’s easier!