1. How can use titrations to work out the concentration of a chemical
Starter:
HCl + NaOH NaCl +H2O
H+ + OH -  H2O
What do these reactions show?
What conditions are necessary for this to occur?
Look at freezaray

2. Glossary
Titration – a method for measuring the volumes of two solutions that react together.
Alkali – A soluble base with a pH less than 7.

3. Titrations -strong acid + strong alkali
= neutralise & form a salt
-But ONLY if they are in exactly the right quantities.
Otherwise, one (acid or alkali) will be in excess
Quick Check:
-If there is more acid than alkali to start with in a neutralisation reaction, what will happen?
The final solution will be acidic

4. This is shown using an indicator.
Titration
A way to measure volumes precisely
End Point
The point at which the acid and alkali have reacted completely.
This is shown using an indicator.

5. Concentration = no. of moles volume
Learn this formula triangle! n c v
number of moles
concentration (in mol dm-3)
volume (in dm3)

6. The Method
V:\Science\Teaching resource store\Freezeray Chem Simulations\titrations[1].swfhttp://

7. Calculations
Follow the example. Read the instructions and use them to answer the first half of the worksheet.
Print out

8. Reactions that aren’t a 1:1 ratio