Essay About Sodium Thiosulfate And Different Concentration

Sodium Thiosulfate and Hydrochloric Acid at Different Concentration of Hydrochloric Acid
Essay Preview: Sodium Thiosulfate and Hydrochloric Acid at Different Concentration of Hydrochloric Acid
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Purpose
The purpose of this lab is to compare the reaction between sodium thiosulfate and hydrochloric acid at different concentration of Hydrochloric acid.
Variables
Independent variable : different concentrated M HCl
Dependent Variable : The time in seconds takes for the cross to disappear
Controlled variables
How it will be control
Amount of sodium thiosulfate solution
The amount if sodium thiosulfate must always be the exact 10ml
amount of HCl solution
The amount of different concentrated HCl must always be the same
Same person to observe every trial
We all have different eyesight and in order to get the exact result, we have to keep the same person to observe the trial
Size and darkness of the cross
Size and darkness of the cross should be the same. Otherwise that might change the result
Raw Data
Different concentration of HCl
Time ∓.01 (in second) it takes to disappear the X sign
0.05
Trials
time(in second)
Trial 1
81.1
Trial 2
84.1
Trial 3
75.1
Trial 4
84.1
Trial 5
93.1
Average time
83.5
Trials
time(in second)
Trial 1
62.1
Trial 2
50.1
Trial 3
63.1
Trial 4
61.1
Trial 5
112.1
Average time
69.5
0.25
Trials
time(in second)
Trial 1
35.1
Trial 2
38.1
Trial