INORGANIC - M2 C2 - Amount of substance

Avagadros constant

6.022×10²³ mol-1

Hydrated salt

A hydrated salt is an ionic compound that contains water molecules (water of crystallisation) in its crystal lattice.

Anhydrous salt

When a hydrated salt is heated, the water of crystallisation is lost, leaving an anhydrous salt.

How do go from cm³ to dm³?

divide by 1000

Equation connecting volume, moles and concentration?

Moles = Concentration x Volume

n=CVA

At RTP, 1 mole of gas is equal to: (molar volume of gas)

24dm³ or 24000cm³

Ideal Equation

pV = nRT

Gas laws (what is Vol. of gas directly proportional to?)

• Volume of gas directly proportional to number of molecules of gas at constant temp and pressure

Gas laws (what is volume inversely proportional to?)

volume is inversely proportional to pressureWh

What assumptions made for molecules making up an ideal gas?

• random motion

• elastic collisions

• negligible size

• no intermolecular forces

Elastic collisions definition

No kinetic energy lost during collision

Ideal Gas law value

8.31J mol-1 k-1

Definition: molecular formula

The amount of atoms of each element in a compound

Definition: isotope

Atoms of the same element with the same amount of protons but different number of neutrons

Ion

A charged atom or molecule due to loss or gain on electrons

Mass abundance equation

((mass x % abundance) + (mass x % abundance)) / 100