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lab_notes_alka_seltzer_.docxLab Notes: Rate of Reaction for Alka Seltzer Tablets
Name: Reem Boushahri
Group 5
· Hypothesis: The reaction of the Alka Seltzer is affected by the acidity of the solution.
· Prediction : The Alka Seltzer will dissolve faster in lemon juice than in water.
· Materials:
Control (CV’s ) : Timing and Temp.
Assumptions : Nothing wrong with the tablets , time is not accrued, nothing wrong with the testing materials and the temp. is constant.
1- 3 Effervescent Antacid and pain relief tablets (Meijer’s brand)
2- Thermometer in C
3- Water (Meijer Brand)
4- 250 ML Beaker (Med lab supply brand)
5- 100 ML Graduated Cylinder (Pyrex 3025-100 Brand)
6- scale (VERITAS Brand) #3
7- Samsung Galaxy smartphone for timing
8- Gloves (Alaska Brand)
9- 3 paper towels ( Meijer brand )
· Methods (Control and Experimental):
1- Great value lemon juice (946ml) ½ cup
2- Scale (VERITAS brand #3 )
4- Beaker 250 ml
5- Water 40 ml
6- Alaska gloves
7- Thermometer in F
8- Samsung Galaxy smart phone (for timing and recording)
9- Graduated cylinder 100 ml
10- 3 paper towels ( Meijer brand )
Experimental methods:
· Test the PH of separate fluids 7th.
1- Pour 20 ml of lemon juice and 40 ml of water in the beaker.
2- Testing the PH level for the water and the lemon juice mixed together.
3- Place beaker and antacid tablet side by side on the top of a towel on the top of calibrated scale.
4- Place antacid in solution.
5- Start timing and video recording.
6- Record dissolving rate every 10 Sec.
· Data (Control Data Table and Experimental Data Table)
Water : Lemon juice :
|
Mass |
Time |
|
183.98 |
10 sec |
|
183.84 |
20 sec |
|
183.79 |
30 sec |
|
183.78 |
40 sec |
|
183.76 |
50 sec |
|
183.74 |
60 sec |
|
1 Time |
2 Time |
|
181.777 |
182.867 |
|
181.643 |
181.730 |
|
181.534 |
181.563 |
|
181.420 |
181.440 |
|
181.345 |
181.440 |
|
181.307 |
181.412 |
Total time: 1:01:62 Loss: 0.24 -0.47 grams
Lemon juice mixed with water:
One time:
1- 183.543
2- 184.365
3- 184.244
4- 184.130
5- 184.006
6- 184.029
Loss: 0.514 gram
Results of water
|
Mass |
Time |
|
188.184 |
10 sec |
|
188.12 |
20 sec |
|
188.12 |
30 sec |
|
187.9 |
40 sec |
|
187.9 |
50 sec |
|
187.9 |
60 sec |
Loss : 0.284 gram
· Support or Refute Hypothesis
Hypothesis is supported
