CHE 2A Lecture Notes - Lecture 4: Magnesium Chloride, Chemical Formula, Calcium Carbonate

• School: UC-Davis
• Department: Chemistry
• Course: CHE 2A
• Professor: Gulacar

Document Summary

Chemistry 2a lecture 4 notes stoichiometry continued . Oct 10th, 2017, professor o. gulacar, uc davis. Note from me: hopefully you"re learning your nomenclaturej because now you need to know it to solve problems. They will name a compound > you deduce the molecular formula > solve the stoichiometric problem. Even one mistake in figuring out the molecular formula could make your entire calculation wrong. Review of iupac id: magnesium chloride = mg2+, cl- (so we need 2 cl"s) mgcl2, calcium carbonate (note: here you need to know what carbonate has and it"s charge, refer last lecture"s notes to memorize. 2- caco3: potassium permanganate = k+ and mno4. (permanganate) kmno4: [hard] sulfuric acid you need to know from memorizing that it has hydrogen and a sulfate group (they wont say hydrogen sulfate) = h+, so4. Avogadro"s number = 6. 022 1023 atoms/molecules/protons = 1 mole of a substance compared to carbon 12.