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Alka-Seltzer Lab report
7
Chemistry Lab Report
By: Courtney New
decrease temperature ---> increase temp.
increase surface area---> decrease or stay the same
decrease pressure---> stays decreased
decrease concentration---> increase or stays the same
increase size---> decrease
increase mechanical mixing---> stays increased
Predictions
trial 1: experiment 1
- hear bubbling, see fizz, colder
- time= 1:19.41 | 2 tab time=1:00.72
trial 2: experiment 2
- hear bubbling, see fizzing, room temp
- time= 39.33 | 1 tab time= 32.07
Data
trial 3: experiment 3
- pressure increased, tablet raised to top, changed water temp to warm, dissolved quickly
- time= 49.47 | time when stirred= 4 seconds
procedure 1
procedure 2
Lab Procedures
procedure 3
image 1
image 2
image 3
image 5
Analysis
temperature= (1)stayed the same, (2) got colder, then got warmer in experiment 3
pressure= (1-2) stayed decreased, (3) increased
size= decreased (1-3)
Molecular Level
Analysis & Conclusion
temperature= it did not change in which the particles do not collide
surface area= stayed the same depending on how many tablets were in the water
concentration= stayed the same
pressure= increased which a chemical reaction occurred and particles collided
size= decreased in which there was no chemical reaction
stirring/shaking= stirring stayed the same and made the tablets dissolve quicker
Some of my predictions were right and some were not