EXAM STUDY Flashcards
Define a heterogeneous mixture
When the particles are distributes non-uniformly and can be mechanically disjointed
Define a homogeneous mixture
When the particles are distributed uniformly throughout and cannot be mechanically disjointed
What is the difference between mixtures and substances?
A substance is one material or has the same composition throughout
A mixture is two or more substances brought together
What is the difference between elements and compounds?
Elements are one type of atom
Compounds are two or more types of elements brought together
How do you separate on particle size?
By sieving
How do you separate on solubility?
Evaporation
How do you separate on density?
Separating funnel or decanting
How do you separate on boiling point?
Distillation or fractional distillation
What causes gas pressure?
Particles colliding with the walls of the container
Describe gas chromatography
The process of separating compounds in a mixture by injecting a gaseous or liquid sample into a mobile phase, typically called the carrier gas, and passing the gas through a stationary phase
State boyles law
PV=PV
