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SCIN 131 SCIN131 LAB 5 SOLUTION (AMERICAN PUBLIC UNIVERSITY)

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(a) (4 pts.) What are the two most important pieces of glassware in this lab demonstration? What is special about these two pieces of glassware that would warrant them to be used in this particular lab? Why these as opposed to, say a graduated cylinder, a beaker, a graduated pipette, etc.?

(b) Suppose you were required to make a solution by diluting 20.0 mL of an aqueous solution to a final volume of 750 mL.

(c) (2 pts.) In your own words, how would you define the term “dilution”? Give a specific example and explain how you use the concept of “dilution” in your everyday life.

PART 2

(a) (4 pts.) What two gas laws (names and definitions) are responsible for how/why the Potato Cannon (a.k.a. spud gun) works? How so? Explain how these laws are working here after the gun ignites to expel the potato. You must be specific and detailed.

(b) (4 pts.) Suppose it is a hot summer day (40.0 degrees C = 104.0 degrees F), and you have left a can of hairspray outside so the gas within it is now at the same temperature of its surroundings. As part of your chemistry lab class, you have to build a safe and effective potato gun to share with the local elementary school, and you must be sure that the combustion chamber is well insulated and will not harm (burn) the shooter. You spray the warm hairspray into the 3.50 L chamber on your gun. You seal the cap, then ignite it, and the resulting gas expands to 13.0 L as the potato is shot out. What is the final temperature, in Celsius, inside the combustion chamber? What is this temperature in Fahrenheit? [SHOW ALL WORK TO RECEIVE CREDIT]

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