Part 1 – Sodium Carbonate plus Hydrochloric Acid
Materials: Watch glass, glass stirring rod, sodium carbonate, hydrochloric acid
CAUTION: Hydrochloric acid is corrosive and can burn you and/or anything
else it touches.
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Put 1 small spoonful of Sodium Carbonate onto a clean/dry watch glass.
Record the appearance of the sodium carbonate in the data table.
Observe a dropper containing hydrochloric acid.
Record the appearance of the acid in the data table.
Add about 10 drops of HCl to the sodium carbonate. Record
observations during the reaction on your data table. (Use your senses)
6) When the reaction stopped, record your observations of each product
formed.
7) Using your observations, determine if this reaction is Endothermic or
Exothermic
8) Rewrite the Equation given as a balanced equation
Part 2 – Sugar subjected to heat
Materials: Aluminum foil square, tongs, candle, lighter, sugar, small spoon
CAUTION: tie back long hair and loose clothing. After step 4, carefully light
the candle.
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Fold the sides of the aluminum foil to make a small tray.
Put 1 small spoonful of Sugar onto your foil tray.
Record the appearance of the sugar in the data table.
Place a candle on top of a paper towel on your tray.
Use tongs to hold the aluminum tray. Heat the sugar slowly (for about
5-10 minutes by moving the tray gently back and forth over the flame.
Record observations during the reaction onto your data table (Use your
senses)
6) When the reaction stopped completely, record your observations of
each product formed.
7) Using your observations, determine if this reaction is Endothermic or
Exothermic
8) Rewrite the Equation given as a balanced equation
Part 3 – Copper Sulfate plus Aluminum
Materials: Vial of Copper Sulfate, small piece of Aluminum foil, thermometer
1) Observe glass vial of Copper Sulfate and a piece of Aluminum foil.
2) Record the appearance of the copper sulfate and aluminum
(separately) in the data table.
3) Wrap foil around the bottom of the thermometer and insert into the
solution. Hold the vial upright as this can become top heavy.
4) Observe for about 5-10 minutes and record your observations onto
your data table (Use your senses and the thermometer)
5) After 5 minutes, record your observations of the products formed.
6) Using your observations, determine if this reaction is Endothermic or
Exothermic
7) Rewrite the Equation given as a balanced equation