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General Information
1) What phrase do you have to memorized to know that the salt solute dissolves (called dissociates) in the water solvent.
2) From your lecture notes, explain in words what happens when solid sodium chloride solute dissolves into the polar solvent water.
3) From your lab data, calculate the Molarity (mole Na1Cl1)/liter Na1Cl1 solution) of the salt solution. Please show all appropriate work especially work to show molar mass of Na1Cl1 (It is 59g Na1Cl1/1moleNa1Cl1).
Boiling Point Elevation
4) From your lecture notes, do you predict that the salt solution or water will boil first?
5) Did you submerge the salt solution container in the water container or visa versa?
6) Which one boiled first, salt solution or water? How long did it take to boil? What observation(s) did you observe to indicate that boiling is happening?
7) How long after first "solution" boiled did the second "solution" boil?
8) Did your lab results support or disagree with what you would expect from your lecture notes (answer to Question 3). Explain.
9) From lab data and answers to questions above, circle or word answer to following: Is the boiling point of solvent Greater than, Less than or Equal to the boiling point of the solution.
Freezing Point Depression
10) From your lecture notes, do you predict that the salt solution or water will freeze first?
11) Did you use small cups or an ice cube tray to do this section of the lab?
12) Which one froze first, salt solution or water? How long did it take to freeze? What observation(s) did you "see" so that you can say the substance froze?
13) How long after first "solution" freeze did the second "solution" freeze? Any different observation for this substance to freeze compared to the first substance?
14) Did your lab results support or disagree with what you would expect from your lecture notes (answer to Question 3). Explain.
15) From lab data and answers to questions above, circle or word answer to following: Is the freezing point of solvent Greater than, Less than or Equal to the freezing point of the solution.