CHEM 181 Lecture Notes - Lecture 3: V8 (Beverage), Iodised Salt, Hirsutism

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

Document Summary

Weighed first, then evaporated to see how much salt would remain. = 3. 5%: galapagos islands ~ 1000 km off shore. Took a sample of water, evaporated, 3. 8% by weight salt found. Have outer electrons and can combine: caso4 = gypsum, mgso4 = epsom salts, ca(hco3)2 decomposes into. Protons determine the element (atomic number): pure sodium and water catches fire and form lye and elemental hydrogen. Na + 2h2o > naoh + h2. Ionic bonding: br2 (l) + 2k (s) > bang 2kbr (crystalline solid, high melting point). Potassium stored under hydrogen because it decays quickly with water: 11na (element number 11) violently combines with chlorine. 2 toxic chemicals = combine to form benign table salt: salt= electrolyte, demonstration: Electrical cord, 2 electrodes with a 2cm space, jar of water, shaker of salt added till light bulb lights up. Lemon juice: 1 can of v8 ~ 650mg of salt, sodium chloride~ where does it occur naturally.