ECON101 Lecture Notes - Lecture 24: Erlenmeyer Flask, Side Arm, Surfactant

• School: University of Waterloo
• Department: Economics
• Course: ECON101
• Professor: Corey Van De Waal

Document Summary

2 different eggs (i. e. 1-white & 1-brown: 50 ml of 3 m hcl, filter paper. To prepare the eggshells, make sure that the inner membrane is completely removed. You may want to do this as pre-lab, or students can do it if time permits: accurately weigh between 0. 450 and 0. 550 g of dried shell into each of 3 labeled 125 ml conical flasks. Be certain you record the mass of shell for each flask in your notebook: add several drops of ethanol to each flask. This acts as a wetting agent and helps the hcl dissolve the. Cac03: slowly pipet 10. 00 ml of 1. 0 m hcl solution into each flask. Swirl the flask to wet all of the solid. Hcl should be disposed of in the sink by diluting with water: heat the solutions in the flasks until they begin to boil and allow to cool.