[CHEM 1127Q] - Midterm Exam Guide - Everything you need to know! (16 pages long)

Chem 114 Spring 2018 Midterm Exam The following chart shows the temperature changes during the evaporation of two alcohols. Answer questions 8- 10 using this chart and your knowledge about molecular force. 9. Which alcohol has the weaker intermolecular forces? 10. What kind of intermolecular forces is found in these compounds? 11. Fill out the following table: Hydrogen Molecular Bond Weight Yes or No) Substance Formula Structural Formulas ethanol n-pentane

Show the mechanism, and draw a likely major product of the following reaction including regiochemistry H20 H2SO4 Ym@성 O.

Chem 114 Spring 2018 Midterm Exam methanol propane 12. If you mix 2g of salicylic acid with 20 ml of t-butyl alcohol. Which substance is the solvent and which one is the solute in this experiment? 13. Calculate the molarity and the molality of a solution prepared by dissolving 3.60 g of ethanol (C2HsOH) with 100.0 g of water to give a final volume that is 102 ml. 14. What is the freezing point of the solution when 15.00 g of ethylene glycol (C2H&02) is dissolved in 148.0 g of pure water? (The freezing point depression constant for water is 1.86 °C-kg/mol). 15) A solution containing 10.0 g of an unknown liquid and 90.0 g water has a freezing point of- 3.33°C. Given K 1.86°Cm for water, the molar mass of the unknown liquid is g/mol A) 69.0 B) 333 C) 619 D) 16 E) 62.1