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8/20/20201Prerequisite Knowledge and SkillsUnit 1Episode 2Today’s TopicsWe will do a quick review of all the prerequisite knowledge and skills listed in the “Prerequisite Knowledge List” in your supplemental course pack, except stoichiometry. We will cover stoichiometry in Episode 3.8/20/20202Basic Math and Conversion Skills• Utilize basic math and algebra functions to solve calculations, including calculations involving fractions, exponents, and scientific notation.• Convert numbers from one unit of measurement to another; for example, convert meters to inches or cm3to liters.• Know the metric prefixes from giga- to nano-. These can be found on the gchem site. Go to “appendix” at the top and then “data and tables”.• Know some basic conversions:• Density of water = 1 g/mL at 25○C• 1 Angstrom = 1 A = 10–10m• 1 cm3 = 1 mL• 1 inch = 1 in = 2.54 cmPractice: Unit ConversionConvert 2.02 g/in3to mg/cm38/20/20203Practice: Dealing with ExponentsFind the answer:(9.8 x 105) / (3.2 x 103)Common Vocabulary• Matter: Know the names and symbols of common elements (Elements #1-20 plus Cr, Fe, Cu, Zn, Br, Ag, Sn, I, Pt, Au, Pb)• Know the names and formula of common polyatomic ions.8/20/20204Using the Periodic TablePeriodic Table: Understand the basic organization of the periodic table: describe the difference between groups and periods, use the table to determine atomic mass and atomic number, find elements with similar properties based on location within the table.8/20/20205Using the Periodic TableBe able to predict charges of monatomic ions from the periodic table. (For example, bromine will form an ion with a charge of –1.)Predict the charge of each:• A sodium ion• A bromide ion• An oxide ion8/20/20206Naming Compounds• Be able to name and write formulae for ionic compounds• Be able to name and write formulae for covalent compounds. This will require you to know the following prefixes:PracticeName each compound:a) NaBrb) K2Oc) CuF2d) NF38/20/20207PracticeWrite the formula for each compound:a) sodium sulfideb) aluminum hydroxidec) dinitrogen tetroxideSolution Concentration: MolarityMolarity: moles solute per liter of solutionMolarity = M = mol solute / liter solution8/20/20208Practice Problems1. If you have 50 grams of sodium chloride dissolved in enough water to make 100 mL of solution, what is the molarity?2. If you 2.25 mL of a 3.5 M NaCl solution, how many moles of NaCl do you have?You should now be able to:Work through practice problems from all of the “List of Prerequisite Knowledge” except stoichiometry, which will be covered in the next

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