CHEM 181 Lecture Notes - Lecture 3: Magnesium Sulfate, Salt, Cinnabar

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

Document Summary

Topic three: macronutrients & minerals lesson 1: minerals i. Approx. same as dissolved mineral material in oceans throughout the world. Galapagos water sample contained 3. 8% salt (less flow of fresh water, always hot) Dead sea is exaggerated effect of this -> ~32% salt (essentially saturated), people can float in it easily because they"re made more buoyant. Elements involved in salts (ions) (sodium, potassium, magnesium, chlorine/ chloride) must differentiate salts from elements themselves. Ca, mg, and na all have one outer electron (easily removed) -> remove electron. Combine with negative species such as hco3-, cl-, and so4= >magnesium sulphate (epsom salts) formed by mg++ and so4= Dolomite can co-crystalize with other molecules, e. g. cinnabar (hgs) Can be bought in health food stores (basically essence of rock) Elements are organized by increasing atomic number, also grouped vertically by their tendency toward somewhat similar properties. When one goes across the table, the elements vary drastically.