Firstly measure your acid or alkali of known concentration, so that you have a reasonable volume of it (not loads, not a tiny drop). Put this into a conical flask and add some indicator (eg.phenolphthalein) and place it onto a white tile so you can see the colour change in the experiment.
Secondly, fill your burette (you would wash this carefully and rinse it with the acid or alkali your going to fill it with first) with your acid or alkali of unknown concentration. MAKE A NOTE OF THE INITIAL VOLUME!
Slowly drip the liquid from the burette into the conical flask, swirling it carefully as you do. As soon as you see a colour change stop dripping and make note of the volume of unknown that went into the conical flask.
DO THE CALCULATION (next card)
PSSSST!.. For an extra mark in a big titration question, mention repeating the test, by running the tap until just before your previous volume has gone into the conical flask, then slowly dripping to get a more ACCURATE result!
Comments
Report
Report
Report
Report