A. KEROSENE 1. Place 3 drops of kerosene in an evaporating dish, and carefully apply a lighted match to the surface of the liquid. Result: _______________________________________________________________________ What hydrocarbons are present in kerosene? __________________________________ 2. To 1 mL of kerosene, add 3 drops of bromine. Result: ____________________________ What does this prove? ________________________________________________________ 3. To 1 mL of kerosene, add 3 drops of dilute potassium permanganate solution. Result: _______________________________________________________________________ What does this prove? ________________________________________________________ B. GASOLINE (CAUTION! No flame should be lighted in this portion). 1. To 3 mL of gasoline, add 3 drops of bromine (CAUTION!). Result: _________________ If the solution remains colored, divide it into 2 portions. Place one portion in the dark and the other potion in a bright light. After 10 minutes, compare the two tubes. Result: ________________________________________________________________ 2. To 2 mL of gasoline, add 3 drops of dilute potassium permanganate solution: Result: _______________________________________________________________________ What does this prove? ________________________________________________________
PROCEDURE:
A. KEROSENE
1. Place 3 drops of kerosene in an evaporating dish, and carefully apply a lighted
match to the surface of the liquid.
Result: _______________________________________________________________________
What hydrocarbons are present in kerosene? __________________________________
2. To 1 mL of kerosene, add 3 drops of bromine. Result: ____________________________
What does this prove? ________________________________________________________
3. To 1 mL of kerosene, add 3 drops of dilute potassium permanganate solution.
Result: _______________________________________________________________________
What does this prove? ________________________________________________________
B. GASOLINE (CAUTION! No flame should be lighted in this portion).
1. To 3 mL of gasoline, add 3 drops of bromine (CAUTION!). Result: _________________
If the solution remains colored, divide it into 2 portions. Place one portion in the
dark and the other potion in a bright light. After 10 minutes, compare the two
tubes. Result: ________________________________________________________________
2. To 2 mL of gasoline, add 3 drops of dilute potassium permanganate solution:
Result: _______________________________________________________________________
What does this prove? ________________________________________________________
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