Elements, compounds and mixtures Flashcards
What is an element?
A substance which contains only one TYPE of atom
What is a compound?
A substance which contains two or more types of atom bonded together
What is a mixture?
Contain different elements or compounds that can be separated as they are
not chemically bonded together
What are the two parts in a chemical reaction?
The starting materials are the reactants and new products are made
What are the 4 state symbols?
- (s)=solid
- (l)=liquid
- (g)=gas
- (aq)=aqueous -dissolved in solution
How do you separate an insoluble solid from a solution?
Filtration; by filtering it out. The solid can then be washed and dried to remove any impurities.
How do you separate a salt from a solution?
Crystallisation; you evaporate the water to produce crystals of salt.
How do you separate and collect a liquid from a mixture?
Distillation; you can use distillation to separate a mixture of liquids.
