Editing CP Questions For Colligative Property Lab
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<b>General Information</b><br> <br> 1) What phrase do you have to memorized to know that the salt solute dissolves (called dissociates) in the water solvent.<br> <br> <br> <br> 2) From your lecture notes, explain in words what happens when solid sodium chloride solute dissolves into the polar solvent water.<br> <br> <br> <br> <br> <br> 3) From your lab data, calculate the Molarity (mole Na<sub>1</sub>Cl<sub>1</sub>)/liter Na<sub>1</sub>Cl<sub>1</sub> solution) of the salt solution. Please show all appropriate work especially work to show molar mass of Na<sub>1</sub>Cl<sub>1</sub> (It is 59g Na<sub>1</sub>Cl<sub>1</sub>/1moleNa<sub>1</sub>Cl<sub>1</sub>).<br> <br> <br> <br> <br> <br> <br> <br> --------<br> <b>Boiling Point Elevation</b><br> <br> 4) From your lecture notes, do you predict that the salt solution or water will boil first? <br> <br> <br> 5) Did you submerge the salt solution container in the water container or visa versa? <br> <br> <br> 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?<br> <br> <br> <br> 7) How long after first "solution" boiled did the second "solution" boil?<br> <br> <br> 8) Did your lab results support or disagree with what you would expect from your lecture notes (answer to Question 3). Explain. <br> <br> <br> <br> <br> 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. <br> <br> <br> --------<br> <b>Freezing Point Depression</b><br> <br> <br> 10) From your lecture notes, do you predict that the salt solution or water will freeze first? <br> <br> <br> 11) Did you use small cups or an ice cube tray to do this section of the lab? <br> <br> <br> 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?<br> <br> <br> <br> <br> 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?<br> <br> <br> <br> 14) Did your lab results support or disagree with what you would expect from your lecture notes (answer to Question 3). Explain. <br> <br> <br> <br> <br> 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. <br> <br> <br>
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