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CH304k Jan 22 - CH304k Measurements Nomenclature Pollutants...

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Unformatted text preview: CH304k Measurements Nomenclature Pollutants Today's Emphasis Take a measurement Hear about nomenclature Practice nomenclature Create a list of pollutants Task #1 Attendance sheet at front Beside your name, write: Example: What you measured The number and unit of the measurement Doe, John ___water volume__35.0 mL_____ But first, HOW to measure Measurements Rules of measurements Be diligent and take the most accurate measurement you can Read all the numbers that the tool gives you Then, guess. Notice: you are allowed to guess only one number. Examples Example 1: Tool accuracy: nearest halfcm Measurement: The line is about 9.0 cm long (note that the line begins at 1cm) 5 10 15 cm Example 2: Tool accuracy: nearest tenthcm Measurement: The line is 8.90 cm long (9.90 cm minus the 1.0 offset at the left) 5 10 15 cm Nomenclature System of naming Today's focus: Binary Molecules Carbon dioxide Nitrogen dioxide Carbon monoxide Nitrogen trifluoride Sulfur trioxide Nitrogen monoxide Phosphorous trichloride Nomenclature Rules for Binary Molecules 1st word: prefix + element name 2nd word: prefix + stem + ide Nitrogen trichloride is NCl3 Dinitrogen trioxide is N2O3 Caveat: prefix mono is usually omitted from 1st word Examples: Phosphorous pentachloride is PCl5 Elemental bromine is Br2 (it is diatomic) Summary Take a measurement, write info next to your name on papers at front of class Complete page 31 of packet: practice on nomenclature Make a list of pollutants on page 33 of packet ...
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