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20201106043003acids Bases Ph Report Sheet 5

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Subject
Biology
School
Collin County Community College
Type
Homework
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ACIDS, BASES AND PH REPORT SHEET
Download the report sheet, complete it, and then submit it via Blackboard email as an attachment. Do not
change the format.
All blue shaded areas require answers.
I. Using indicators to measure pH
Experiment (at home lab)
Making a set of standards (5 ml solution + 5 ml cabbage extract)
pH
substance
color
2
lemon juice
bright red
3
vinegar
Reddish pink
5 (optional)
rainwater
-
7
tap water
Light purple
11.5
ammonia or soapy water
Soapy water(dark blue)
Determining the pH of some solutions (5 ml unknown + 3 ml cabbage extract)
Unknowns
estimate pHvalue (not color)
7up®
pH 4
grapefruit juice
pH 3
bleach
pH 12
II. The pH Meter and pH paper
Experiment (dry lab)
Measuring pH using a pH meter and pH paper.
Solution
pH meter
pH paper (estimate pH value not color)
distilled water
6.95
pH 7
apple juice
3.60
pH 4
vinegar
2.23
pH 1
carbonated soft drink
2.72
pH 3
coffee
5.00
pH 5
detergent water
9.86
pH 10
milk
6.28
pH 7
Vinegar
Detergent water
pH meter
Name:
Unit #

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III. Buffers
Experiment (dry lab)
Determine the buffering capacity of a solution.
pH of Solution A
0 ml
1ml
2ml
3ml
4ml
5ml
6ml
7ml
8ml
9ml
10ml
HCl
6.92
6.92
6.92
6.92
6.92
6.92
6.92
6.92
6.92
6.92
6.92
NaOH
6.92
6.95
6.95
6.95
6.95
6.95
6.95
6.95
6.95
6.95
6.95
pH of Solution B
0 ml
1ml
2ml
3ml
4ml
5ml
6ml
7ml
8ml
9ml
10ml
HCl
5.03
4.60
2.72
2.23
2.11
1.28
1.28
1.28
1.27
1.27
1.27
NaOH
5.09
6.09
6.89
6.89
6.89
6.89
6.89
6.89
6.89
6.89
6.86
Plot both A and B solutions,A in red and B in blue. (This can be done using Microsoft insert
shapes or manually graph, scan and embed image into your report).
Which is the better-buffered solution, A or B?
The better-buffed solution will resist a change in pH.
Solution A

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ACIDS, BASES AND PH REPORT SHEET Name: Unit # Download the report sheet, complete it, and then submit it via Blackboard email as an attachment. Do not change the format. All blue shaded areas require answers. I. Using indicators to measure pH Experiment (at home lab) Making a set of standards (5 ml solution + 5 ml cabbage extract) pH substance color bright red 2 lemon juice Reddish pink 3 vinegar 5 (optional) rainwater Light purple 7 tap water Soapy water(dark blue) 11.5 ammonia or soapy water Determining the pH of some solutions (5 ml unknown + 3 ml cabbage extract) Unknowns estimate pHvalue (not color) pH 4 7up® pH 3 grapefruit juice pH 12 bleach II. The pH Meter and pH paper Experiment (dry lab) Measuring pH using a pH meter and pH paper. Solution pH meter 6.95 distilled water 3.60 apple juice 2.23 vinegar 2.72 carbonated soft drink 5.00 coffee 9.86 detergent water 6.28 milk p ...
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