Lab 6,7 - Keith Williams Mr Feighan Chemistry Lab 6,7...

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Keith Williams Mr. Feighan Chemistry 10/3/14 Lab 6,7 Experiment 6 The Bunsen Burner Introduction: The device; for providing heat in the laboratory is the Bunsen burner. The gas enters the burner at the base through a rubber tube connected to a gas jet on the side of the reagent shelf. The flow of gas is regulated by the gas valve on the gas jet. As the leaves the rubber tube and enters the base of the Bunsen burner it mixes with air which enters through the intake holes just above the base of the Bunsen burner. The amount of air and, therefore, the heat of the resulting name is controlled by opening or closing these holes. If the holes are open, more air enters and the flame will be hotter. This is called a Bunsen flame. If the holes are closed, less air enters and the flame. will be cooler. This is called a luminous fíame. Procedure A; Lighting the Bunsen Burner Attach the rubber tube connected to the Bunsen burner to Uie gas ¡et on the side of the reagent shelf. Light a match, THEN TURN ON THE GAS SUPPLY. As you turn on the gas you should be holding the lighted match above the Bunsen burner and at the perimeter oí the barrel. • If the match is extinguished by the force of the gas, tum off the gas, ¡ight a new match and hold it away from the center of the burner barrel. • When the burner is lit, you can control the height of the flame by opening or closing the gas valve. Your flame should be a "quiet" flame. There should be very little "noise". If there is "noise use the gas valve to decrease the amount of gas going to the Bunsen burner. Caution: Do not lean over a lighted Bunsen burner; do not lean over the burner while lighting it; keep the burner away from the reagent shelf and the wood.
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