1. CINDY PARK 10A
Acid Reaction Lab
Report
[Type the document subtitle]
Cindy Park
2012 Dec~2013 Jan
Comparing acid’s reaction in different temperature. Testing the principle of

2. Content
Introduction
Hypothesis
Equipment
Variables
Procedure
Result
Conclusion
Analysis

3. Title: Acid Reaction Lab Report
Design
Research Question:
At what temperature oC of Hydrogen-Chloride would zinc react and dissipate the fastest
to?
Introduction:
This lab is purposed to analyze and compare the different reaction of acid in different
temperature.
Hypothesis:
If the temperature of water increases, the molecules inside the water become more active.
Contrastively, if the temperature of water decreases, the molecule inside the water
becomes more solid and doesn’t move around that much. Base on this fact I predict that
the reaction of higher temperature acid will be faster than the lower temperature acid.
Acid is also a liquid like water, so in different temperatures the molecules of acid will react
in the same way with water. And as the molecule becomes more active it will show faster
reaction.
Equipment:
Beakers(250ml), timer, test tubes, lab apron, goggles, gloves, thermometer (0~100oC line
every one degree thermometers error is +- 0.5oC), ice, boiler, water, acid (6.0 Molar HCl),
zinc cut in same size (width and length 0.6~0.7 mm), lighter, thin wooden stick,10ml
graduated cylinder.
Variables:
Controlled Variables:
Amount of acid, size of zinc,
Dependent Variables: How quickly zinc reacts to each temperature of HCl

4. Independent Variables:
Temperature of the acid
Procedure:
1. Prepare 3 beakers of water different temperature of water.
2. Prepare 3 test tubes each filled with 5ml of acid and put it in each water.
3. Put once piece of zinc in each test tube in the same time, and also turn on the
timer and measure the time when the zinc disappears.
4. Analyze what happens and record the result
5. After the zinc had disappeared put in the lightened thin wooden stick slowly into
each beaker and analyze what happens to the flame on the stick.
6. Do the same process on the other two beakers filled with manipulated
temperature.
7. Analyze the result.
Design all aspects complete.

5. Result
Dropping Zinc into the Acid
Graph 1: Second/Degrees graph. (Time the zinc melted in different temperature)
Time the zinc melted
(second/degrees)
150
100
Time the zinc melted
50
(second/degrees)
0
0 9 24 43 53
degrees degrees degrees degrees degrees
These data were collected from this HCl & zinc lab. Due to the results of this lab, we see
the zinc reacting faster as the temperature of the HCl goes higher. The range of error of
the temperature would be about +- 0.5oC, because our eyes aren’t that good enough to
measure this small range. The range of error of the time would be +- 1~2 seconds
because we were quite on time.
0 Degrees 9 Degrees 24 Degrees 43 Degrees 53 Degrees
Time 132 second 31 second 17 second 10 second 8 second
(2 minute 12
seconds)
Numbers of decimals does not match your
stated error. Needs much more qualitative
observations listed.

6. Putting the flame into the Test Tube
0 Degrees 9 Degrees 24 Degrees 43 Degrees 53 Degrees
The flame off off off off Off
was on or
not
This is the data we collected during the flame experiment. It didn’t make any sound but
from the white gas we can predict the reaction had occurred. Every flame went off or
nearly off when we put it inside the test tube.
Dcp aspect 1 partial
Aspect 2 partial
Aspect 3 complete

7. Conclusion
We measured the time the zinc disappeared after we put it in the acid. The time got
shorter as the temperature of the water was higher. After we lighted up the wooden stick
with the lighter and put it in the test tube (right above the acid) and check if the flame
goes off or not. It resulted that in all test tubes the flame
Base on the result, we can see that the temperature gives a huge impact on the reaction
time of the zinc. Comparing to the cold water (0 oC) the hot water (53oC)’s reaction time
was way more fast (2 minute and 10 second faster). As the temperature went up higher,
the reaction time gets faster.
So the result shows that my hypothesis, the reaction will occur as the temperature goes
up, was correct. But a point to add based on the result of the flame experiment is that no
matter how fast the reaction occurred the chemical reaction’s essence doesn’t change.
Evaluation
The errors throughout our lab were mostly unavoidable. Errors occurred from
measurements. We couldn’t be perfectly accurate for measuring the amount of acid, size
of zinc, and the exact time we started. But there could have been improvement towards
our lab if we were able to do one beaker in one time. Because we didn’t have enough
time we had to test 3 beakers at once and measure the time at once too. But if we could
have done that one by one the results would have been more accurate.
Ce aspect 1 complete
Aspect 2 partial
Aspect 3 not at all