CAT 3: Research Investigation GROUP ACTIVITY
ONE REPORT PER GROUP
SODIUM BICARBONATE AND VINEGAR TEST
Main Research Question: What type of vinegar is the most reactive with sodium bicarbonate?
Other questions to research and comment on:
What is the formula for each of the substances used in this experiment?
What is the word and chemical equation for this experiment?
List the uses of the different substances in this experiment.
Write out what happens during this experiment to the different atoms.
Why does vinegar and sodium bicarbonate react together.
Aim: To determine…? To Determine …..
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Watch You Tube clip: ‘Fair Test Investigation’ https://www.youtube.com/watch?v=OoGkCtrFYQY
Hypothesis:
Write this style of hypothesis:
If ____________________________________________, then ________________________________________________.
Variables:
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Independent: Type of vinegar
Dependent: Height of bubbles/foam
Controlled: - Amount of sodium bicarbonate
Amount of vinegar
Temperature of vinegar
Materials:
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3 x 100ml beaker
white board marker
spatula
scale: electronic balance
3g sodium bicarbonate
25ml white vinegar
25ml malt vinegar
25ml apple cider vinegar
Thermometer (optional)
Method:
1. Mark each beaker with whiteboard marker labelled
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white vinegar
malt vinegar
apple cider vinegar
Measure 25ml of each vinegar in a measuring cylinder and pour into appropriate labelled beaker.
Place 3g of sodium bicarbonate in a spatula (1 spatula full).
Add the sodium bicarbonate to white vinegar.
Observe the reaction and mark the level the reaction bubbles to.
Repeat for malt wine and apple cider vinegar.
Results: Table 1 – Height of bubbles / foam
Type of Vinegar
White
Height of Bubbles (cm)
Trial 2
Trial 3
Trial 1
Malt
Apple cider
Graph Results (bar graph) – include fully labelled axes, appropriate scale and title
Discussion:
Which vinegar reacted the most with the sodium bicarbonate?
Which vinegar reacted the least with the sodium bicarbonate?
Write the word equation for the reaction between white vinegar and sodium bicarbonate.
What were some limitations of the experiment?
How could these limitations be improved in the future?
Conclusion:
Re-state your hypothesis
Accept or reject your hypothesis.
Explain why you accepted or rejected your hypothesis. Use evidence from Table 1.
Checklist for conclusion
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What was investigated ?
What was discovered?
Did the data support or disprove the hypothesis
Evidence from the data collected ( DATA )
Average