Partical Theory And Seperation Flashcards
Psychical change
no change in particles, just the particle arrangement and energy, easy to reverse e.g. mixing water and salt
Chemical change
A chemical reaction takes place and a new substance is formed, very difficult to reverse e.g. burning a match
Durning a chemical reaction
the atoms rearrange to form a new substance. Might be seen by colour change, temperature
change, light being emitted or bubbles.
Law of conservation of mass
Matter can be changed from one form to another. During physical and chemical changes, there is no overall change in ma
What is a mixture
A mixture consists of two or more substances mingled together but not chemically combined e.g. sand and water
What are the four methods of separating mixtures
Filtration,evaporation, distillation,chromatography
Filtration
Used to separate small insoluble solids (do not dissolve in a liquid) from a liquid by using filter paper and a funnel to trap the solids. E.g. sand and water.
