For SQA National 5 Chemistry, learn about the properties of acids and bases and how to tell them apart with this BBC Bitesize Scotland revision guide.

Add a level spatula of calcium hydroxide powder to the beaker. Stir thoroughly, then estimate and record the pH of the mixture (as in step 2). Repeat steps 3 and 4 until there are no more changes ...

Japanese trading company Sumitomo Corp and Australian lithium developer Liontown Resources said on Monday they had agreed to work together to study producing lithium hydroxide in Japan.