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Chemistry-Procedure Lab 8

Chemistry-Procedure Lab 8 - d Measure the water in the sink...

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1. Set up apparatus seen in Figure 8.4 a. Inside of the flask must be completely dry b. The glass tube and rubber stopper should be as short as possible c. The rubber tubing should be long enough that it can be clamped. d. Make sure the rubber stopper is tight i. You don’t want it falling out 2. Place 2 or 3 boiling chips in the 600mL beaker a. Clamp the flask and fill the beaker to almost over-flowing with water b. Make sure most of the 250mL flash is submerged c. Heat the water to a boil 3. Let water boil for 5mins. a. The temperature of the air in the flask and the water in the beaker should be the same. b. Measure the water in the beaker to the nearest tenth i. Record as T1 4. While the water is still boiling. a. Clamp the tube. b. Remove clamp and flip the flask up-side down in the cold water. c. Allow it to sit there for 4-5mins
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Unformatted text preview: d. Measure the water in the sink i. Record as T2 5. After 2 or 3 more minutes raise the flask so that the waterlevels are even. a. Clamp the tubing. b. Remove glass from the water 6. Measure the volume of the water in the flask in a graduated cyclinder a. Record as (Triangle) V obs’d 7. Measure the actual volume of the flask a. Fill it until the water is over-flowing b. Replace the rubber stopper and clamp. c. Wipe any excess water from top d. Record the volume of the flask i. Record as V1 8. Record the barometric pressure in torr. a. Record as P1 9. Find the vapor pressure of T2 in Appendix A. a. Record as P(water vapor) 10. Calculate a. Subtract vapor pressure from atmospheric pressure, P1. i. Record as P2 11. Calculate V2 using combined gas laws...
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