CHEM 181 Lecture Notes - Lecture 3: Calcium Sulfate, Cinnabar, Sea Salt

• School: McGill University
• Department: Chemistry
• Course: CHEM 181
• Professor: Ariel Fenster

Document Summary

Mechanism to find salt concentration (%g) in certain amt of water: put on hot plate, heat applied to beaker, evaporates water. Shore of new jersey:60ml, 3. 5% of the weight (same weight than a paperclip). Shore of galapagos islands: 1 mole (6x1023 molecules of water) of water or 18g of water, heat applied&let water evaporate, white salts: 3. 8%. turns out to be ~10% more than shores nj. Likely reason: little fresh water that flows through& warmer weather all year long. Dramatically shown in salt concentration id dead sea: ~32%; visitors can float easily. Weight difference between an element and its ion: much less than micrograms. Some ionic species and examples of how they can combine (sea salts) Soak heated water and epsom salts supposedly beneficial to feet salt. *cinnabar for years used in vermillion = paint pigment but mercury toxicity, not used anymore. *put in pill form what was in stone form.