Neutralization reaction:
Page_____________
Materials:
Ammonia solution in water
Vinegar
2 beakers
Universal Indicator
Pipet
2 graduated cylinders
Universal pH guide
Procedure:
1. Measure 50mL of ammonia in the larger graduated cylinder.
2. Put that into the larger beaker.
3. Measure 20 mL of vinegar and place that in the smaller beaker.
4. Get teacher to add Universal Indicator to both beakers. Record the starting pH.
5. Add one drop of vinegar to the ammonia. Swirl and record. Continue one drop at a time
with a swirl and recording until you reach a neutral color green found on the pH guide.
Data:
Initial
pH
1
drop
2
drops
3
drops
4
drops
5
drops
6
drops
7
drops
8
drops
9
drops
10 drops 11
12
drops drops
13
drops
14
drops
15
drops
16
drops
17
drops
18
drops
19
drops
20 drops
21
22
drops drops
23
drops
24
drops
25
drops
26
drops
27
drops
28
drops
29
drops
30 drops
31
32
drops drops
33
drops
34
drops
35
drops
36
drops
37
drops
38
drops
39
drops
Vinegar
Ammonia
Conclusion:
1. How much vinegar (in drops) was needed to change the pH?
2. Why did vinegar change pH of the solution?
3. What would have changed in we used pure ammonia instead of a diluted solution?