CHEM 181 Lecture Notes - Lecture 3: Iron-Deficiency Anemia, Kosher Salt, Potassium Iodide

• School: McGill University
• Department: Chemistry
• Course: CHEM 181
• Professor: David Noble Harpp, Ariel Fenster, Joseph A Schwarcz

Document Summary

Great variety of soluble minerals in the ocean: In a 60 ml sample of ocean water, about 3. 5% by weight salt. 40% of salt weight comes from sodium ~ in 10g of salt, 40% 4g is sodium. Ion: atom or molecule in which the total number of electrons is not equal to the total number of protons. Weight difference between an elements and its ion is much less than micrograms. Salt: chemical compound formed from the reaction of an acid and a base. Some combinations of ions: ca2, mg2, na, hco3, cl, so4. Limestone ~ ca(hco3)2 caco3 + co2 + h2o. Dolomite, calcium carbonate and magnesium carbonate cocrystallize with other minerals like cinnabar (mercury sulphide), which was used as vermillion pigment in paint (toxic). Some dolomite products (sold as supplements) may have traces of toxic materials such as arsenic, mercury, lead or aluminum ~ do not always need to be shown if present in very small quantities.