Chemistry

Derrick Mitchell Period A 10/10/10 Purpose: To create hydrogen by using zinc and hydrochloric acid Materials: * Penatriotic trough * Several test tubes * Burner * Gas valve * Tube supports * Zinc * Hydrochloric acid * Stopper w/ gas distributor and pressure equalizer tube * 50 mL beaker * 250 mL beaker Formula for making hyrdrogen: (ZN(s) +HCL)> (H2 (g) +ZnCL2) Procedure: First fill the pentriotic trough with water. Next put about test tubes in the water. Now, the zinc should already be in the in the 250 mL beaker. If it was used before then you have to decant the zinc. This means you fill the beaker with water, you will see that the water is dirty, and pour it out until the water is clear. Once the zinc is decanted and water until it covers the surface of the zinc. Once that is done place the stopper with the gas distributor and the pressure equalizer on the 250 mL beaker. Make sure the pressure distributor tube is water but is not touching the bottom of the beaker. When the stopper is secure, turn the gas valve on and light the burner. Once the burner is lit the reaction will start. Take the hose from the penetriotic trough and place it in one of the test tubes and make sure the water is still in there. Hold the hose in the test until all the water is just about gone. You have made hydrogen. Then place the test tube upside down so the hydrogen won’t escape. When the test tube is full with hydrogen, place the test tube toward the burner at an angle going upward. A small explosion, almost like a fireball, will pop out the test tube. Observations: when the reaction started, the zinc and the water started to foam. The water was starting to turn white. While the reaction was occurring, you could see the water going up and down the pressure equalizer tube. You could also see that when the gas is going into the test tube the water is evaporating and turning to fog. Conclusion: the result of the lab was that hydrogen gas was created. When the hydrogen was created it made a small fireball when placed next to the burner. Therefore the purpose was obtained.