reactions in a bag investigation
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Reactions in a bag Investigation. Chemistry G B Trimester 2. Background. This investigation involves the mixing of four reagents in a plastic bag. When all are mixed, a chemical reaction will occur. - PowerPoint PPT PresentationTRANSCRIPT
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REACTIONS IN A BAG INVESTIGATION
Chemistry G BTrimester 2
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Background This investigation involves the mixing of four reagents in a plastic
bag. When all are mixed, a chemical reaction will occur.
You are responsible for identifying the evidence of a chemical reaction and which reactant or combination of reactants is responsible for that
observation.
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1. Mass 5 grams of calcium carbonate (A).
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Mass 2.5 grams of sodium bicarbonate.
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2. Place the two solid reactants inside the bag together on the
left side of the bag.
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Place the liquids (5mL of water and 20 drops of phenol red) on the right side of the bag.
They should not mix at this point.
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3. Make sure the bag has very little air inside it and
seal it.
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4. Mix the contents of the bag thoroughly. (Open the bag to release pressure if needed.)
5. Make observations about the changes taking place.
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6. We know what happens when all four reagents are mixed, but which one or combination of reactants
explain the various observations? Create a list of control tests using different
combinations to determine the role of each reactant. These can be done qualitatively.
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A = Calcium ChlorideB= Sodium Carbonate
C= Phenol RedD= Water
Control # Combination Control #
Combination
1 A + B + C 6 D + C
2 A + B + D 7 A + D
3 A + B 8 A + C
4 B + C 9 B + D
5 C + D + B 10 D + A + C
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CONTROLS # 1-3
1 32Warm
Warm
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CONTROLS # 4-7
4 5 66 7
Warm
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CONTROLS #8-10
8 10
9
Warm War
m