Titrations Flashcards
What does a burette do?
Measure different volumes & let you add solution drop by drop
What is the indicator used in titrations?
Phenolphthalein
What is the colour of phenophthalein in acid & alkali?
Colourless in acid
Pink in alkali
Why should you stand flask on white tile?
Make it easier to see exactly when end point is
Why do we do rough titration first?
To get an idea where end point is
What is the end point?
Exact point where alkali is neutralised & indicator changes colour
Why do we add acid dropwise near end point?
If you don’t notice exactly when colour changes, you’ll overshoot & result won’t be accurate
What is a standard solution?
A solution that you know exact concentration of
How do you make a standard solution?
Dissolve known amount of solid in known amount of water to create known concentration
