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

Content

Introduction

Hypothesis

Equipment

Variables

Procedure

Result

Conclusion

Analysis

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

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.

Result

Dropping Zinc into the Acid

Graph 1: Second/Degrees graph. (Time the zinc melted in different temperature)

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

(2 minute 12

seconds)

31 second 17 second 10 second 8 second

0

50

100

150

0

degrees

9

degrees

24

degrees

43

degrees

53

degrees

Time the zinc melted

(second/degrees)

Time the zinc melted

(second/degrees)

Numbers of decimals does not match your

stated error. Needs much more qualitative

observations listed.

Putting the flame into the Test Tube

0 Degrees 9 Degrees 24 Degrees 43 Degrees 53 Degrees

The flame

was on or

not

off off off off Off

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

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 (0oC) 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