/Experiment 5- Gas Laws
Title: Gas Laws
Purpose: To learn about different gas laws
Procedure:
Boyle’s Law: weights on plunger
-Plunger with just atmospheric pressure is 33mL; with weight of 2.5 lbs, the volume is 27 mL- gas is getting compressed;
-With 2 2.5 weights (total of 5lbs)
-With 7.5 lbs; its 18mL
-with 10lbs of weight; its 16.5 mL
-Total of 15 lbs; its 13.0mL
-The higher the pressure, the smaller the volume
Charles’ Law: syringe and hair dryer
-Flask has been cooling and syringe and thermomter
-Plunger should raise with temp increase
-Plunger is slowly rising over time
Ideal Gas Law: Calculate Molar Mass for Acetone
-Commonly used in finger nail polish remover
-Fill flask with acetone and there is hole in top that will let out excess oxygen and some acetone
-Weight of flask and foil on balance: 112.1373 mass
-1.8 mL of acetone
-Clamp on flask and set on water bath
-Acetone has boiling point of 57 degrees celsius
-Flame is turned on and will let it heat until 66 degrees to ensure the acetone is vaporized and it has filled the flask
-13 mins later
-Slight bit of flask not under water (could cause error)
-66.4 degrees celsius when flame is turned off and flask is out of hot water bath
-Flask is then placed in cool water to help recondense and vapor acetone
-Dries of water from flask so it doesn’t add mass; we just want weight of acetone
-Mass after experiment is 112.7900; mass of acetone in flask
Ideal Gas Law: Measuring Moles of Mass produced from a reaction
-CaCO3(s) + 2HCl (aq) → CaCl2 (ag) + H20 (l) + CO2(g)
-PV= nRT
-Using gas apparatus that helps us measure volume of gas
-Water with green food color
-3 Parts: 1) reaction chamber- syringe; 2) Gas Buret- allows us to measure gas produced; 3) leveling bulb- if its level than its under atmospheric pressure
-Need to check and make sure system is airtight and no CO2 or O2 is leaking out; can do this by picking up the bulb and making sure gas buret stays level at the bulb changes; if /its not air tight the level of the gas buret will move up and down with leveling bulb
Title: Gas Laws
Purpose: To learn about different gas laws
Procedure:
Boyle’s Law: weights on plunger
-Plunger with just atmospheric pressure is 33mL; with weight of 2.5 lbs, the volume is 27 mL- gas is getting compressed;
-With 2 2.5 weights (total of 5lbs)
-With 7.5 lbs; its 18mL
-with 10lbs of weight; its 16.5 mL
-Total of 15 lbs; its 13.0mL
-The higher the pressure, the smaller the volume
Charles’ Law: syringe and hair dryer
-Flask has been cooling and syringe and thermomter
-Plunger should raise with temp increase
-Plunger is slowly rising over time
Ideal Gas Law: Calculate Molar Mass for Acetone
-Commonly used in finger nail polish remover
-Fill flask with acetone and there is hole in top that will let out excess oxygen and some acetone
-Weight of flask and foil on balance: 112.1373 mass
-1.8 mL of acetone
-Clamp on flask and set on water bath
-Acetone has boiling point of 57 degrees celsius
-Flame is turned on and will let it heat until 66 degrees to ensure the acetone is vaporized and it has filled the flask
-13 mins later
-Slight bit of flask not under water (could cause error)
-66.4 degrees celsius when flame is turned off and flask is out of hot water bath
-Flask is then placed in cool water to help recondense and vapor acetone
-Dries of water from flask so it doesn’t add mass; we just want weight of acetone
-Mass after experiment is 112.7900; mass of acetone in flask
Ideal Gas Law: Measuring Moles of Mass produced from a reaction
-CaCO3(s) + 2HCl (aq) → CaCl2 (ag) + H20 (l) + CO2(g)
-PV= nRT
-Using gas apparatus that helps us measure volume of gas
-Water with green food color
-3 Parts: 1) reaction chamber- syringe; 2) Gas Buret- allows us to measure gas produced; 3) leveling bulb- if its level than its under atmospheric pressure
-Need to check and make sure system is airtight and no CO2 or O2 is leaking out; can do this by picking up the bulb and making sure gas buret stays level at the bulb changes; if /its not air tight the level of the gas buret will move up and down with leveling bulb
