1)create a table organised in: moles start,change and end for each of the substances
2)Calculate the moles from the info given
3) calculate the limiting reactant-the first reactant reacts with second reactant with(reactant of first x coefficient of the second reactant).if it is less if it is limiting but if it is more it is in excess and the first is limiting.
4) minus the limiting from start moles and multiply it to the product needed to find out its moles.
Back titrations calculations
1.Write out full equations for both reactions
2. Identify the key substance involved in both reactions as a reactant
3. How much of key substance(in moles) in the second reaction?
4.How much of key substance (in moles) in the first reaction? minus inital from final to get how much reacted.
5. How much of substance questions asks for -use the key substance and the mole ratio
Back titration with titre
1 find mean titre
2. moles of key substance using volume of mean titre
3. amount of what sample is used multiply it if it makes up a bigger solution.
4. continue doing the calculation they've asked for.
