CHEM 181 Lecture Notes - Lecture 1: Calcium Bicarbonate, Kosher Salt, Potassium Iodide

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

Document Summary

60 ml sample of ocean water: 3. 5% salt. In the galapagos: 3. 8% salt, higher because hotter year round, little fresh water flows out of the galapagos. Dead sea: salt concentration ~ 32% Electrolytes: have outter electrons that can be easily removed, ca2+, mg2+, na+ Caso4 = gypsum (white in powdered form) Mgso4 = epsom salts (used by people for soaking) Ca(hco3)2 caco3 + co2 + h2o: caco3 = limestone. Caco3 + mgco3 = dolomite (source of magnesium and calcium) Hgs = cinnabar (used as paint pigment, vermillion) Dolomite: may have arsenic or lead as trace elements, can be poisonous, you can obtain ca and mg from diet instead. Vertical columns of periodic table represent elements with similar properties. Horizontal rows show increase in atomic number, not similar. Nucleus = protons (+: # protons determines the element, equivelant # electrons that balance protons, na + 2 h2) naoh + h2.