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Experiment
A
Spoonful of Sugar
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Problem: Can you dissolve
more sugar in hot or cold water?
Research: Look up information
about dissolving and solutions.
Hypothesis: Predict whether
you can dissolve more sugar in the hot or the cold water.
I think that more sugar will dissolve
in ___________________ water.
Setting Up the Experiment:
Materials:
-
bag of sugar
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2 beakers or measuring cups
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hot water
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cold water
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measuring spoons with milliliters
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chart to record your results
Procedure:
Manipulated Variable: Temperature
of the water (This is the only thing you can change.)
Responding Variable: The amount
of sugar in milliliters that dissolves. (these are the results that
you will measure and record.)
Steps:
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Pour 150 ml ( about 3/4 cup) of cold water
into a beaker or measuring cup
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Add 5 ml (1 teapoon) of sugar and stir until
the sugar crystals dissolve. Add another 5 ml of sugar and stir.
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Keep adding the sugar until no more will dissolve.
Stop when you see sugar crystals settling down on the bottom of the glass.
Record how much sugar dissolved (use tally marks to keep track, then count
by 5s to figure out the amount of ml all together.
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Do two trials with the cold water. Make sure
that you rinse the beaker if you are using the same one for the second
trial.
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Now pour 150 ml ( about 3/4 cup) of hot water
into the other beaker or measuring cup.
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Add sugar, 5 ml at a time and stir to dissolve
it. Stop when you see sugar crystals settling down on the bottom of the
glass. Record how much sugar dissolved (use tally marks to keep track,
then count by 5s to figure out the amount of ml all together.
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Do two trials with the hot water. Make sure
that you rinse the beaker if you are using the same one for the second
trial.
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Record your results
Results:
Make a chart like this to record your
results. Then you can graph the totals on a bar graph.
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Trial
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ml of sugar dissolved
in COLD water
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ml of sugar dissolved
in HOT water
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1
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2
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Total
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Conclusion:
Look over your results. What did you find
out? Which temperature helped dissolve more sugar? Write your conclusion
and answer the problem. Tell if your hypothesis was correct or incorrect.