CHEM 181 Lecture Notes - Lecture 2: Femur Neck, Dill, Aspergillus Niger

• School: McGill University
• Department: Chemistry
• Course: CHEM 181
• Professor: David Noble Harpp

Document Summary

Ocean: large amount of soluble minerals dissolved in the ocean. 60 ml of clear water contains 3. 5% of salt determined by evaporating water with hot plate: amount of mineral material/salt material in most oceans: 3. 5% Not the case in every part of the world. Galapagos island: 1 mole (18grams/ 6 x 10^23 molecules) of water contains 3. 8% salt (10% more than new jersey) There is very little fresh water that flows out of the galapagos island. Rather warm all year long and therefore salt concentration is higher. The dead sea: percentage of salt: ~32% Video 2: ca + so4 = gypsum. White in powdered form: mg + so4 = epsom salts (magnesium sulfate, ca + h(co3)2 =caco3 (calcium carbonate) + co2 (carbon dioxide) + h2)(water) Caco3 (calcium carbonate) = limestone: na + cl = table salt, caco3/mgco3 = dolomite. Often co-crystalizes with other minerals: ex. Mercury sulfide /hgs: used as vermilion: a paint pigment.