Topic 1 - particles and mixtures

How does a smaller Mr help particles to diffuse faster

A smaller Mr means smaller particles

What is solubility

The ability of a substance to dissolve in a solvent

Solubility equation

Solubility = mass of solid/mass of water x 100

what is solubility measured in ?

g per 100g of water

What is the mass of a neutron, electron and proton ?

Neutron = 1

electron = almost 0

proton = 1

What is a molecule

2 or more atoms bonded together

what does the mass number account for

the number of protons and neutrons in the atoms of a nucleus. - this is where most of the mass of an atom is

what is the atomic number ?

The number of protons

What is an isotope ?

An atom of the same element that has the same number of protons but different numbers of neutrons

What does it mean if a substance is pure ?

A substance is made of one element or compound

What is a chromatogram

A chromatogram is a pattern of spots formed when separating a mixture using chromatography

How is Rf calculated ?

Rf = distance travelled by solute / distance travelled by solvent