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Unformatted text preview: 30 mL beaker. Add 5 drops of each of the known solutions and the
unknown solutions to separate wells of the spot plates. Be s ure to match the s olution to the prope rly
labe le d we ll!
Set up a Bunsen burner. Make sure it is not at the edge of the bench, under the Plexiglas shield or under the shelf
above the bench. Light the burner and adjust it to a compact flame. Remember, never leave a lit Bunsen burner
Clean the wire loop as follows: Dip the loop end of the nichrome wire into the HCl(aq) in the beaker and stir the
acid gently for a few seconds. Then heat it in the hottest part of the Bunsen burner flame until it glows. When no
color is imparted to the flame, the wire is clean. You may have to repeat this process a couple of times. Note
that the acid wash accomplishes the cleaning, so give extra attention to this procedure. Also, some clean wires
impart a pale yellow color to the flame.
Dip the clean metal loop into the well of the solution to be tested and bring the loop (slowly) to the hottest
portion of the Bunsen...
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This document was uploaded on 01/22/2014.
- Spring '14