Chem100VL_LabLectExp2_IDcpds2 (1).pdf - Iden�%on and...

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Iden%fica%on and Characteriza%on of Unknowns 1
Intensive Proper%es for Iden%fying Unknowns Intensive proper,es are independent of the amount of amount of substance. The value does not change with added mass or volume Texture Polarity Color Solubility Mel%ng Point/Boiling Point Density Refrac%ve Index Electrical Conduc%vity Spectral data 2
Extensive Proper%es Extensive proper,es depend on the amount of a substance, The more of a substance you have, the larger the value. Extensive proper%es must NOT be used to ID unknowns. mass Volume shape Amount Thickness Energy 3
Iden%fica%on of Unknowns Goal: Iden%fica%on of an Unknown substances based on the intensive proper%es solubility, density, mel%ng/boiling points Hypotheses: The intensive proper%es of a substance do not change with mass or volume. There are 3 unknowns in this experiment. 1. Find the unknown # required on the quiz and iden:fy that unknown 2. Solid Unknown, select from boDles according to Last Name A-­‐D Solid1 E-­‐H Solid 2 I-­‐M Solid 3 N-­‐R Solid 4 S-­‐U Solid 5 V-­‐Z Solid 6 3. Liquid Unknown, select from boDles according to Last Name A-­‐D Liquid 7 E-­‐H Liquid 8

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