Question
answer part 2 question a.
show all work
Report 1. Graphs and calculations a. Plot temperature versus time for each set of data. The temperature scale (the y axis) she be chosen so that it can be read to one decimal On the graph, clearly label the freezing point of the solvent, the freezing point of the solution and indicate the value for the freezing point depression b. c. Calculate the molality of the isopropyl alcohol-acetic acid solution d. From the known weights of solute and solvent, determine the GMW of isopropyl alco (The density of glacial acetic acid is 1.05 g/ml) Report the accuracy of your result, expressed as % error Answer (Show work for all numerical problems.) a. Predict which of the following would be the most effective anti-freeze, assuming equal e. 2. weights of each are used: methyl alcohol (CHiOH); sucrose (C12H2201): ethyl alcohol b. How would you prepare a 1.50 molal solution of sucrose in water? At what temperature c. When 8.40 grams of a non-electrolyte was dissolved in 80.0 grams of water, the solution d. How many grams of ethylene glycol must you add to 10.00 liters of water in your car (GH5OH); ethylene glycol (GH4(OH)2)·Explain your choice. would the solution begin to boil? froze at -1.52 °C. Calculate the molecular weight of the solute. radiator to protect against freezing at-10.00 °C? To w hat Fahrenheit temperature does this solvent: no supercooling solvent: supercooling fp tp time solution: no supercooling solution: supercooling fp time
Explanation / Answer
2. a
Depression in freezing point is a colligative property. If the number of moles of solutes are more, the freezing point also decreases in a solution. In the present case, for one mole all the substance work similarly as an anti-freezing agent.
if we are calculating the antifreeze activity per gram of the solute, the molar mass is less for methanol and it will work effectively than other solutes.
