TItrations (how to do the experiment) (concentrations)

Titrations (how to do the experiment)

• 
• What are titrations?
• Titrations allow you to find out exactly how much acid is needed to netralise a quantity of alkali (or vice versa)

The method:

• 
• 1. put some alkali in a flask
• 2. add some indicator - phenolphthalein or methyl orange (not universal indicator as it changes colour too gradually)Add the
• 3. acid to a burette and slowly pour the acid into the alkali and swirling the flask regularly.
• 4. As soon as you think that the alkali is close to being neutralised, begin adding the acid more slowly (one drop at a time)
• 5. the indicator changes colour when all the alkalis have been neutralised - phenolphthalein is pink in alkalis but colourless in acids , and methyl orange is yellow in alkalis but red in acids.