• 500 mL beaker
• 30g Tea
• 300 mL Water
• 15g of calcium carbonate
• Heating Plate
• Filter paper
• Büchner funnel
• Aspirator Kit
• Ring Stand
• 500 mL suction flask
• Separatory funnel
• 100 ml dichloromethane

• Weighed 30 g of tea bags and mixed 300 mL of water in a 500 mL beaker.
• Weighed 15 g of calcium carbonate and poured it into the 500 mL beaker.
• Put solution on a hot plate and waited for solution to boil.
• While boiling, (for 20 minutes) stirred occasionally with a spatula.
• Set up aspirator kit, making sure it was vacuuming properly.
• After boiling for 20 minutes, we poured the heated solution in the Büchner funnel and began filtering.
• We used an Erlenmeyer flask to press the tea bags; we wanted to obtain as much as the liquid as possible.
• After filtering, we cooled the solution to 20°C (room temperature).
• We then took the cooled solution and poured all of it in the seperatory funnel.
• We then began extracting the caffeine with four successive 25 mL portions of dichloromethane or 100 mL.
• After extraction, we stored the caffeine/dichloromethane solution in a 125 mL Erlenmeyer flask.

Observations:

• Smelled like fresh tea while boiling.
• While boiling, we lost some water due to evaporation.
• Took a while to filter because tea grounds kept getting into the remainding solution.
• Seperation of water and caffeine had to be done under the hood due to minimize the dichloromethane fumes. Gloves were also used.
• Caffeine and dichloromethane solution appeared an oily yellow.
• Water and dichloromethane seperation took a while, this was because we had to make sure that we had a pure caffeine solution.

We will finish caffeine extraction next week