moles

what is a mole

one mol is the amount of a substance that contain 6.02 x 10 23 particles

what is avagadros constant

this is 6.02 x 10 23 mol -1 which is the number of particles in one mol of a substance

equation linking mass, molar mass and mr

mass = mr x molar mass

what is molecular formula

the number of atoms of each element in a molecule

what is empirical formula

the simplest whole number ratio of atoms of each element in a compound

what is a hydrated salt

crystal salts where water molecules are part of their crystalline structure

what is water of crystalisation

the water that is part of a crystalline structure of a hydrated crystal

what is an anhydrous salt

a salt from which all water of crystalline particles have been removed

what are the possible sources of uncertainty in the experiment

-breaking salt by heat, may evaporate
-not heating for long enough
-balanced drifted
-salt may be damp -too much water

what is the equation for hydrated slat when you just know the molar mass

x = (M hydrated - M hydrous salt )/ 18