Key concepts Chemistry Solubility Water Temperature Introduction Have you ever mixed sand and salt together and wondered how you could separate them again? If you had to separate them, would you have ...

Science presenter Jon Chase demonstrates that a large piece of expanded polystyrene will dissolve in a very small volume of propanone. He defines the terms solute, solvent and solution. By dissolving ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...