Data Tables Drops of HCl added pH Beaker 1 Acetic Acid Acetate pH B...

Data Tables: Drops of Â Â HCl added pH Beaker 1 Acetic Acid + Acetate pH Beaker 2 Ammonia + Ammonium pH Beaker...

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Question

Chemistry

Data Tables:
Drops of Â Â HCl added
pH Beaker 1
Acetic Acid + Acetate
pH Beaker 2
Ammonia + Ammonium
pH Beaker 3
Water
0 drops
4.86
9.55
5.49
2drops
4.76
9.46
2.61
4drops
4.61
9.35
2.34
6 drops
4.50
9.24
2.17
8 drops
4.36
9.12
2.06
10drops
4.21
8.96
1.99
12drops
4.02
8.75
1.90
Drops of NaOH added
pH Beaker 1
Acetic Acid + Acetate
pH Beaker 2
Ammonia+ Ammonium
pH Beaker 3
Water
0 drops
4.97
9.72
8.90
2drops
5.04
9.76
11.68
4drops
5.10
9.82
12.00
6drops
5.17
9.88
12.20
8drops
5.24
9.95
12.33
10drops
5.32
10.02
12.40
12drops
5.40
10.10
12.50
Post lab Questions (written or type out on a separatesheet):
(Q1) According to your graphed data is one buffer (beaker 1-3)better or worse than the other(s)? Explain.
(Q2) Write out the chemical reaction that occurs in the AceticAcid / Acetate buffer when
NaOH is added
HCl is added
(Q3) Write out the chemical reaction that occurs in theAmmonia/Ammonium buffer when
NaOH is added
HCl is added
(Q4) Write out the chemical reaction that occurs in theDistilled water when
NaOH is added
HCl is added
(Q5) Does distilled water make a good buffer? Why or whynot?
(Q6) How can you tell if the buffer is working?
(Q7) What happens when you go beyond the buffer capacity? How isbuffer capacity indicated on your graph(s)?

Answer & Explanation Solved by verified expert

3.7 Ratings (598 Votes)

Q1The simplest definition of a buffer is a solution that resistschanges in hydrogen ion concentration as a result of internal andenvironmental factors Buffers essentially maintain pH for asystemHereChange in pH on adding 12 drops of HClBuffer1 486 402 082Buffer2 955 875 080Buffer 3 549 190 359Change in pH on adding 12 drops of NaOHBuffer1 540 497 043Buffer2 1010 972 0 38Buffer 3 See Answer

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Drops of Â Â HCl added	pH Beaker 1 Acetic Acid + Acetate	pH Beaker 2 Ammonia + Ammonium	pH Beaker 3 Water
0 drops	4.86	9.55	5.49
2drops	4.76	9.46	2.61
4drops	4.61	9.35	2.34
6 drops	4.50	9.24	2.17
8 drops	4.36	9.12	2.06
10drops	4.21	8.96	1.99
12drops	4.02	8.75	1.90

Drops of NaOH added	pH Beaker 1 Acetic Acid + Acetate	pH Beaker 2 Ammonia+ Ammonium	pH Beaker 3 Water
0 drops	4.97	9.72	8.90
2drops	5.04	9.76	11.68
4drops	5.10	9.82	12.00
6drops	5.17	9.88	12.20
8drops	5.24	9.95	12.33
10drops	5.32	10.02	12.40
12drops	5.40	10.10	12.50