Titration of a vinegar with an indicator
Ten millilitres of vinegar diluted ten times, two drops of phenolphthalein, and sodium hydroxide at 0.100 mol/L in the burette. The indicator stays colourless while acid remains and turns pink the moment the base is in excess: that drop is the equivalence.
Loading the laboratory
Drag the tap key down to open, up to close. Press O to toggle it. Click a name or an object to look closer, double-click the bench to step back. Slide the view with shift + scroll, the arrow keys, a right-button drag or two fingers.
Step 1 of 11
- 1Get ready
Goggles and gloves: sodium hydroxide at 0.1 mol/L is corrosive to the eyes.
- 2Fill the burette
- 3Predict the colour
- 4Deliver 10 mL
- 5What do you see at 10 mL?
- 6Find the turn
- 7The equivalence
- 8Read Veq
- 9From Veq to the vinegar
- 10Why phenolphthalein?
- 11Titration done