Question

Suplementary Questions Carbon Dioxide Conclusions 1. Can a candle burn in carbon dioxide? Does carbon dioxide burn? 2. What happened to the burning candle? Could carbon dioxide be used as a fire extinguisher? 3. Why should you release the carbon dioxide into the bottom of the cup? Hydrogen Conclusions 1. What difference did you notice between Parts 1 and 2 in the hydrogen experiment? Explain. 2. What is the purpose of the soap solution? 3. Why should extreme care be exercised when working with hydrogen gas? 4. What are the two major gases found in the air? Which one is reacting with hydrogen in this experiment? Oxygen Conclusions 1. Did the glowing splint re-ignite with oxygen? What would happen if you were to discharge carbon dioxide onto the glowing splint instead? 2. Why does wood burn with a flame sometimes and just glow red other times? Why does blowing gently on a glowing piece of wood often cause it to burst into flames? 3. What did the lime water test prove? Experiment 9-12 Hydride Degree of Effervescence Acid-Base Odor Support of Prepared NHs H2S Litmus Test Combustion n one No Rosia dous Support of Combustion Degree of Prepared Effervescence Color Oxide Acid-Base Litmus Test no odloNo low No change letu心sred CO2 SO2 oln No, and No neduun chlor ne adiee auidienone orine as prown Observations from lime water test Acid-Base Support of Litmus Test Combustion Odor Degree of Effervescence Element Prepared IlEne_ H hiah haん NO no 0aOUw | No Change Ind odow_ no odlaunJes No ChangeUrS Part 2 With a syringe half-full of hydrogen, draw in an equal volume of air and repeat the experiment. Please warn others around you before you light this mixture. Cap your syringe and label it to use in a later experiment. Production of O2: Prepare a syringe full of oxygen using syringe method using 0.05 g solid KI powder and 5 mL of 6% H202. The production of O2 is slow and it typically takes a minute or more to fill a syringe. Assist the plunger in its outward movement. To speed up the reaction, hold the plunger so that the contents inside the syringe are under reduced pressure and while doing so, tap or shake the syringe. This process drives oxygen bubbles out of the solution NOTE!!! Even though the reaction is slow PAY ATTENTION to it. You don'v want this to explode on you! Support of Combustion: Transfer 30 mL O2 (g) to the kit's larger test tube (18 x 150 mm) using the long piece of tubing so that the gas can be discharged near the bottom in order to displace the air. Ignite and blow out the wooden splint and immediately plunge the burning splint into an oxygen-filled test tube. The splint will re-ignite. Hold the splint inside the test tube until it goes out (just a few seconds). Add about 2 -3 mL of limewater to the test tube. Stopper and shake the test tube to mix gas and limewater. Note the results.

Answer 1

1) No candle cannot burn in carbon dioxide arhter it needs oxygen.Neither it burns nor it helps burning. It is a non combustible gas.

2) The flame go out in carbon dioxide environment, this is why can be used as fire extinguisher (as it neither burns nor help in burning rather)

3) Carbon dioxide is released to the bottom the cup, as it is heavier than air and hence is collected by upward displacement of air.