1. Titrations Calculations

2. What is Titration ?
A titration experiment is a scientific procedure designed to determine how concentrated an acid or base is by using the opposite solution.
By figuring out how much of the known solution to use, you can find the concentration of the unknown solution.

3. Titrations Calculations

4. Titration Calculations - Procedure
Gather all the suspects in the one place.
Step 1 – Write out the balanced equation for the neutralisation reaction.
2. Establish relationships between the suspects.
Step 2 – Determine the “mole ratio” between the alkali and the acid.
3. Split the prime suspects and collect all the known” evidence on each !
Step 3
ACID
ALKALI
Split the page into two sections.
Labelled acid and alkali.
Look at the clues to determine the following factors for each side.
N = Number of Moles
C = Conc in Mol/l
V = Volume in Litres.

5. C V N Titration Calculations - Procedure
4. Having gathered all the evidence it should now be obvious how to solve the case however some final interrogation could be required. !
Step 4 – Use the “mole ratio” to establish the N value for the unknown solution
5. With the final interrogation complete you are now ready to solve the case.
Step 5 – Use the triangle to complete the calculation N C V

6. ALWAYS WRITE THE BALANCED EQUATION FIRST !
Titration Calculations - Example
If 25cm3 of a solution of sodium hydroxide is exactly neutralised by 13.5 cm3 of 0.6 mol/l sulphuric acid, what is the concentration of the alkali?
ALWAYS WRITE THE BALANCED EQUATION FIRST ! 2 + + 2
NaOH
H2S04
Na2SO4
H20
Once you gather all the suspects - Now the “Detective” work starts !!!
ACID
ALKALI
Split the page into two sections.
Labelled acid and alkali.
Look at the clues to determine the following factors for each side.
N = Number of Moles
C = Conc in Mol/l
V = Volume in Litres.

7. ALWAYS WRITE THE BALANCED EQUATION FIRST !
Titration Calculations - Example
If 25cm3 of a solution of sodium hydroxide is exactly neutralised by 13.5 cm3 of 0.6 mol/l sulphuric acid, what is the concentration of the alkali?
ALWAYS WRITE THE BALANCED EQUATION FIRST ! 2 + + 2
NaOH
H2S04
Na2SO4
H20
Once you gather all the suspects - Now the “Detective” work starts !!!
ACID
ALKALI
V = Litres
V = Litres
C = 0.6 mol / l
C = ?
N = ? = C x V
= 0.6 x 0.135 =
N alkali = 2 x N acid
= 2 x =

8. C V N Titration Calculations
Concentration For Sodium Hydroxide = N / V
0.0162 =
0.025
= Moles / Litre

9. Now It’s Your Turn to Solve a Few MysteriesC V

10. Well Done. The Case is Solved.