Lab 3 procedure - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17...

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1. Obtain a crucible and a crucible cover 2. Assemble ring stand 3. Obtain a wire triangle and place it on the ring stand 4. Connect the hose to the gas source and Bunsen burner. Make sure the Bunsen burner’s valve is completely closed (counter-clockwise). Light the Bunsen burner and adjust the flame. 5. Place the crucible on the wire triangle on the ring stand and place the burner under the crucible. 6. Slowly heat the crucible for three minutes on a low flame 7. Turn the gas knob clockwise to increase the flame and heat on a high flame for 5 minutes. 8. Turn the knob counter-clockwise and turn the gas valve off to cut the flame. Use the crucible tongs to place the crucible on top of the wire gauze. Leave it there until the crucible is room temperature. 9. Use the analytical balance to weigh the crucible. Repeat the heating/cooling/weighing process to make sure the weight is consistent. Make sure the measurements are within 3mg of each other.
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