States Of Matter And Elements, Compounds, Mixtures (mocks) Flashcards
Define a saturated solution
A solution into which no more solute can be dissolved (into the solvent)
How are changes of state achieved?
Particles gain energy when heated, so the forces (of attraction) between the particles are overcome
Describe the movement of particles in a liquid
Particles move around each other
How do you calculate the Rf value from a chromatogram?
Distance of dye from baseline / distance of solvent from baseline.
Define a mixture
An impure substance made from different elements or compounds mixed together that are not chemically joined.
What is the purpose of crystallisation
To obtain a salt which contains water of crystallisation from a salt solution.
What is the purpose of a paper chromatography
To separate parts of mixtures into their components.
define an element
a pure substance listed in the periodic table that only has one type of atom in it
define a compound
a substance made from more than one type of element chemically bonded together.