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Viscosity Test Planning (a) Aim To determine which of these: diethyl ether, Propionic acid, 1-butanol, and 1-hexanol are most viscous through an evaporation method. Hypothesis Propionic acid is going to be the most vicious because the stronger the intermolecular forces the more viscous. Its molecular formula is C3H602, the C is bonded to an OH and the C is also double bonded to an O. Therefore, there are strong intermolecular forces, like hydrogen bonds. Also the double bonded oxygen has a lone pair attracting the electropositive H creating a dipole moment. Selecting Variables The independent variable is the chemical and the dependant variable is the change in mass (g). The controlled variables are the volume (ml), the same door height of the fume cupboard, the time (s) interval and to the fix problems with density we are going to take the percentage of change in mass. Planning (b) Method 1. Use a Pertri dish (to support the filter paper) 2....

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