Amount of a substance
Unit = Mole
The amount of any substance containing as many particles as there are in exactly 12g of the Carbon-12 isotope
The number of atoms per mole of the Carbon-12 isotope
6.02 x 1023
Mass per mle of a substance.
Unit = g/mol (g mol-1)
The simplest whole-number ratio of atoms of each element present in a compound
The actual number of atoms of each element in a compound
1-A substance containing NO water molecules
2-A substance containing water molecules
Water of crystallisation
Water molecules that form an essential part of the crystalline structure of a compound
The amount of solute, in mol per 1 dm3 of solution
When are they used?
A solution of known concentration.
Standard solutions are normally used in titrations to determine unknown information about another substance.
1-The solid that dissolves
2-the liquid that the solute dissolves into
3-A solute dissolved into a solvent