George finds lots of things to put in his marvellous medicine – toothpaste, washing powder, even shoe polish! Mr Killy Kranky has asked George to remember the ingredients he put into the marvellous medicine. Maybe finding out the colour of the ingredients, whether they are acid or alkali, would help to recreate the medicine?

 

The pH Scale

 

We can use the pH scale to work out whether substances are acid or alkaline. Can you put these items in the correct order?

 

 

Acids and Alkalis

Can you fill in the blanks to complete the sentences about acids and alkalis?

 

 

Mini pH Quiz

 

Now try this!