A. Apparatus: A ring stand, a Florence flask, a square of wire net, a chemical thermometer, a Bunsen burner.
Method: Place the Florence flask, half full of water, on the square of wire net upon the large ring of the ring stand
over the Bunsen burner. Put the chemical thermometer in the Florence flask, clamping it in such a way that the bulb is covered by the water and yet does not touch the bottom of the flask.
Make record in the notebook as follows:
(1) The temperature when the first small bubbles appear on the side of the flask.
(2) Temperature when the first large bubbles appear on the bottom.
(3) Temperature when many bubbles rise rapidly to the top.
(4) Point at which temperature ceases to rise.
(5) Temperature when vapor first appears at the mouth of the flask.
(6) What differences are apparent in the amount and motion of the vapor before and after boiling?