Faster Plop, Plop, Fizz, Fizz: A Scientific Method
Investigation
Katie Letson
10/30/2022
CAROLINA
1
Data
Activity 1
1. State a hypothesis for Activity 1 using an "if/then" statement. Remember to create a statement that can be tested empirically. If the temperature of the water is hot, then the Alka Seltzer tablet will dissolve faster than it would in cold water.
Data Table 1
Run No. 1 1 1 2 2
Temp. ('c) 8 25 52 9 24
Time (sec.) Observations 128.7 Slow dissolve 39.7 A little more bubbles 17.3 Many more bubbles moving vigorously 128.1 Very little bubbles 40.3 Moving a bit faster with more bubbles Tablet was smashed and dissolved 17.9 quickly many more vigorous bubbles Slow tablet was smashed, and it does 128.9 seem to be bubblier than the first and second cold tablet. 39.9 About the same as last time Very quick dissolve and vigorously 17.6 bubbling. This is all 3 cold temp. and time added 128.567 together and divided by three This is all three room temp. data entries 39.967 added together and divided by three All of the three hot data entries are added 17.6 together and then divided by three.
Cup c RT H c RT H
2
51
3
c
8
3
RT
24 51
3
H
c
8.33
Avg.
Avg. Avg.
RT
24.33
H
51.33
2. Using graphing software such as Excel@, graph the results of Activity 1. Please see the Introduction to Graphing manual for guidance.
the time in seconds it takes to dissolve, and the independent variable is the temperature water the Alka Seltzer is dissolved in.
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2
4. Which is the independent variable? Should it be on the X- or Y-axis? Why? The independent variable is the temperature of the water that the tablets dissolve in. They should be graphed on the x axis. I can pick any value I want for this variable because it is up to the researcher and the x variable effects the y variable. It is following the way others do it also so it makes it understandable because a scientist would expect the independent variable to always be on the x axis. To follow procedure or protocol.
5. Which is the dependent variable? Should it be on the X- or Y-axis? Why? The dependent variable is the time it takes in seconds to dissolve. It should be on the y axis because it is the correct way of doing it and will be easily understood if done this way.
6. Predict how many seconds it will take to dissolve an Alka-Seltzer@ tablet in 200 mL of water at the following temperatures. Use the exponential trend line to find the function used in predicting the time. If needed, please refer to the Introduction to Graphing manual for guidance
a. 35'C y = 3.9743x + 18.24
Y = 3.9743(35) +18.24
Y = 157.3405 seconds
b. 60'C
60=3.9743x+18.24
X+10.5075 seconds
c. 80'C
80= 3.9743x+18.24
X=15.5 seconds
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