Group 3
Experiment 1: Investigating the Effect of Temperature on the Rate of Chemical Reaction
Using Food Coloring and Water
Objective: To explore how temperature influences the rate of a chemical reaction using food
coloring and water.
Materials:
 Three beakers
 Hot water
 Food coloring (preferably a dark color
 Stirring rod or spoon
for better visibility)
 Stopwatch or timer
 Cold water
 Dropper
 Tap water
Procedure:
1. Start by dissolving the food coloring in tap water in the small beaker.
2. Put a 200 mL of cold water, tap, and hot water in the separately in the three beakers.
3. Add the same amount of food coloring (around 1 drop) into each beaker.
4. Once the food coloring is added, simultaneously start the stopwatch or timer two beakers
three beakers.
5. Observe and record the time it takes for the food coloring to completely disperse in each
beaker. Record your observations on the provided data table below.
Data Table:
Water Temperature
Time for Food Coloring to Disperse (seconds)
Cold Water
2 minutes and 07.77 secs
Tap Water
1minute and 05.02 secs
Hot Water
40.72 secs
Discussion Questions:
1. Compare the time it took for the food coloring to disperse in each temperature of water.
The food coloring dispersed the fastest in hot water (40.73 seconds), followed by tap
water (1 minute and 5 seconds), and lastly, cold water (2 minutes and 7 seconds).
2. How does temperature affect the rate of the chemical reaction in this experiment?
The food coloring dispersed fastest in hot water, followed by tap water, and slowest
in cold water. This shows that higher temperature leads to a faster rate of the
chemical reaction between the food coloring and water.
3. Can you relate this experiment to any real-world applications where temperature
influences chemical reactions?
For example, you are making a hot chocolate. When you mix cocoa powder into hot
milk, it dissolves fast because the milk is hot. But if you mix cocoa powder into cold
milk, it takes longer because cold milk makes it dissolve slower. So, just like in the
experiment, temperature can change how fast things dissolve, like in making hot
chocolate.
Conclusion:
We observed that higher temperatures result in faster disperse of the food coloring, while
lower temperatures lead to slower disperse. This shows that the rate at which a substance
disperses is influenced by the temperature.
Experiment 2: Investigating the Effect of Concentration on the Rate of Chemical Reaction
Using Vinegar and Baking Soda
Objective: To explore how changing the concentration of baking soda affects the rate of the
chemical reaction with vinegar.
Materials:
 Vinegar (acetic acid)
 Baking soda (sodium bicarbonate)
 Measuring spoons


Two small containers or beakers
Stopwatch or timer
Procedures:
1. Pour the same amount of vinegar into the two beakers. You can use about 50ml of vinegar
for each beaker.
2. Using the two spoons, measure half a tablespoon of baking soda on the first spoon and
measure a full tablespoon of baking soda on the other spoon.
3. After measuring the right amount of baking soda, pour the two spoons in the separate
beakers at the same time.
4. Immediately start the stopwatch or timer when the baking soda comes contact into the
vinegar
5. Observe and record the time it takes for the reaction to reach completion. Note any visible
changes, such as fizzing or bubbling.
6. Record your observations on the provided data table below.
Data Table:
Baking Soda Concentration
Half Tablespoon
Full Tablespoon
Time for Reaction to Complete (seconds)
28.56 secs
34.06 secs
Discussion Questions:
1. How does changing the concentration of baking soda affect the rate of the chemical reaction
with vinegar?
Changing the amount of baking soda used changes how fast the reaction happens with
vinegar. In our experiment, we saw that using more baking soda made the reaction a
bit quicker than using less. This shows that adding more baking soda can make the
reaction with vinegar speed up.
2. Can you explain the mechanism behind the reaction between vinegar and baking soda?
When vinegar and baking soda mix together, they react to make bubbles and fizz. This
happens because vinegar contains something called acetic acid, and baking soda has
a substance called sodium bicarbonate. When they meet, they react and make carbon
dioxide gas, which forms the bubbles we see. So, the bubbling and fizzing we observe
are because of this reaction between the vinegar and baking soda.
3. How might this experiment be modified to investigate other factors that affect the rate of
the reaction?
To explore other factors affecting reaction rates, modify the experiment by adjusting
variables such as temperature, stirring intensity, or using different concentrations of
vinegar.
Conclusion:
We observed that using more baking soda makes the reaction with vinegar happen faster.
This shows that the amount of baking soda affects how quickly the reaction occurs.
Comparing the times for reactions with different amounts of baking soda helps us
understand how concentration affects reaction speed.
Worksheet: Investigating the Effect of Surface Area on the Rate of Chemical Reaction
Using Vitamin C Tablets
Objective: To explore how changing the surface area of vitamin C tablets affects the rate of a
chemical reaction.
Materials:




Vitamin C tablets (ascorbic acid)
Mortar and pestle (for grinding)
Water
Stopwatch or timer

Two small containers or beakers
Procedures:
1. Measure equal amounts of water into each container. You can use about 100ml of water for
each.
2. Prepare one whole vitamin C tablet and grind the other vitamin C tablet into a fine powder
using the mortar and pestle.
3. At the same time, pour the whole tablet and the powdered vitamin C in the separate
container
4. Immediately start the stopwatch or timer when the tablets come into contact with water.
Stir each container gently to facilitate the dissolution of the vitamin C.
5. Record the time it takes for the tablets to dissolve completely in each container. Record your
observations on the provided data table below.
Data Table:
Vitamin C Tablet Surface
Area
Whole Tablet
Pulverized Tablet
Time for Reaction to Complete (seconds)
2 mins and 30.62 secs
1 min and 01.05 secs
Discussion Questions:
1. Compare the time it took for took for the tablets to dissolve completely in each container.
The whole tablet took longer to dissolve compared to the pulverized tablet.
2. Analyze the relationship between the surface area of the vitamin C tablet and the rate of
the chemical reaction.
Breaking the tablet into a fine powder makes more of its surface area touch the water.
That's why the powdered tablet dissolved faster than the whole one. This is because
the water molecules can reach more of the tablet's parts when it's in smaller pieces.
So, the bigger the surface area of the tablet, the quicker it dissolves in the water.
3. How does changing the surface area of the vitamin C tablet affect the rate of the chemical
reaction with water?
Increasing the surface area by grinding the tablet enhances the rate of the chemical
reaction. The pulverized tablet dissolved more rapidly, indicating that a larger surface
area facilitates quicker interactions with water molecules.
Conclusion:
The experiment illustrates that altering the surface area of vitamin C tablets impacts the
rate of the chemical reaction with water. The pulverized tablet, with increased surface area,
dissolved more quickly than the whole tablet. This emphasizes the importance of surface
area in influencing the speed of chemical reactions, as a larger surface area allows for more
efficient interaction between the reactants.
Worksheet: Investigating the Effect of Catalyst on the Rate of Chemical Reaction Using
Vinegar and Baking Soda
Objective: To explore how the presence of a catalyst affects the rate of a chemical reaction between
vinegar and baking soda.
Materials:







Vinegar (acetic acid)
Baking soda (sodium bicarbonate)
Two empty bottles with narrow openings
Balloons (two)
Measuring cup
Funnel (optional)
Stopwatch or timer
Procedures:
Part 1: Preparation

Pour 50 ml of vinegar into each empty bottle.
Part 2: Setting Up the Experiment
 Stretch the opening of one balloon over the mouth of each bottle, ensuring a tight seal.
 Place a small amount of baking soda (about one teaspoon) inside one of the balloons.
 Ensure that both balloons are securely attached to the bottles, with no leaks or gaps.
Part 3: Conducting the Experiment
 Carefully lift the balloon containing baking soda and shake it gently to allow the baking
soda to fall into the vinegar.
 Observe and record any changes in the balloon's size and shape. This indicates the
production of gas due to the chemical reaction.
 Start the stopwatch or timer as soon as the baking soda enters the vinegar.
 Monitor the balloons closely and record the time it takes for the balloon with baking soda
to inflate fully.
 If the balloon inflates fully, stop the timer and note the time. If not, record the maximum
inflation observed within a reasonable time frame.
Part 4: Observations and Data Collection
 Record the time it takes for the balloon with baking soda to inflate fully or to reach its
maximum inflation.
 Record your observations on the provided data table below.
Data Table:
Setup
Time for Balloon to Inflate (seconds)
With Catalyst (Baking Soda)
20.25 secs
Without Catalyst
0
Discussion Questions:
1. What is a catalyst, and how does it affect the rate of a chemical reaction?
A catalyst is a substance that speeds up a chemical reaction without being used up in
the process. In this experiment, baking soda acts as a catalyst. It helps the reaction
between vinegar and baking soda happen faster by providing a different way for the
reaction to happen.
2. Can you explain the chemical reaction that occurs between vinegar and baking soda?
When vinegar and baking soda mix together, they create bubbles and fizz. This
happens because vinegar has something called acetic acid, and baking soda has
sodium bicarbonate. When they come into contact, they react and produce carbon
dioxide gas, water, and sodium acetate. So, it's like a fizzy reaction that you can see
in the balloon.
3. How might this experiment be modified to investigate other factors that affect the rate of
the reaction?
We can try different things to see what makes the reaction faster or slower. For
example, we can use more vinegar or baking soda to see if it changes how fast the
balloon blows up. Or, we can try changing the temperature of the ingredients to see
if that makes a difference.
Conclusion:
We observed that the presence of a catalyst (baking soda) affects the rate of the chemical
reaction between vinegar and baking soda. We observed that when baking soda was present,
the balloon inflated much faster compared to when it was absent. This demonstrates the
role of a catalyst in speeding up chemical reactions.
DOCUMENTATION
Members:
Rei Anne Narag
Maricel Rodriguez
Jamillah Carlos
Mary Jane Tumanguil
Alcher Baccay
Johndale Parallag
Renzel Velasco
Adrian Pamittan
Rodge Mora
Christian Palogan* (absent)