Titrations
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What are titrations?
Method of analysing concentrations in solutions.
What do titrations do?
Allow you to find out exactly what volume of acid is needed to neutralise a measured volume of alkali (and vice versa)
How to do a titration?
• using a pipette and pipette filler add a set volume of an alkali to a conical flask with 2-3 drops of indicator. • use a funnel to fill a burette with some acid of a known concentration. Wear safety glasses • use the burette to slowly add the acid while swirling it regularly going especially slowly when a colour change may happen. • when the indicator changes colour when all of the alkali has been neutralised. • record the final volume of acid in the burette and use it with the initial reading to calculate the volume of acid used to neutralise the alkali.
how to find a concentration in mol/dm^3?
no. of moles/volume