AnswersAA-F26 Physical ScienceLab: Acids and Bases

Lab: Acids and Bases Answers

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1
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The independent variable, the one that is intentionally manipulated, is [___].

A
the pH of the solution
B
the physical properties
C
the system for measurement
2
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The dependent variable, the one that you measure the response in, is [___].

A
the pH of the solution
B
the physical properties
C
the system for measurement
3

increasedecrease✔ stay the same

A
increase
B
decrease
C
✔ stay the same
6

red (left)purple (middle)✔ green (right)

A
red (left)
B
purple (middle)
C
✔ green (right)
7

tomato juiceorange juice✔ gastric acid

A
tomato juice
B
orange juice
C
✔ gastric acid
8

12✔ 34

A
1
B
2
C
✔ 3
D
4
9

Which could be sources of error in the lab? Check all that apply.measurement of volumes when making the serial dilutionsapproximating the pH based on matching colors between pH papersmiscalculation of pH values using the reference tablesnot boiling the cabbage long enough or hot enough to make the indicator solutionusing distilled water to make your dilutions instead of sea water

A
measurement of volumes when making the serial dilutions
B
approximating the pH based on matching colors between pH papers
C
miscalculation of pH values using the reference tables
D
not boiling the cabbage long enough or hot enough to make the indicator solution
E
using distilled water to make your dilutions instead of sea water
10

✔ pH = 6pH = 8pH = 14

A
✔ pH = 6
B
pH = 8
C
pH = 14
12

✔ red (left)purple (middle)green (right)

A
✔ red (left)
B
purple (middle)
C
green (right)
13

two timesten timestwenty times✔ one hundred times

A
two times
B
ten times
C
twenty times
D
✔ one hundred times
14

34✔ 56

A
3
B
4
C
✔ 5
D
6
16

red (left)✔ purple (middle)green (right)

A
red (left)
B
✔ purple (middle)
C
green (right)
17

✔ baking sodaammonia solutionbleach

A
✔ baking soda
B
ammonia solution
C
bleach
18

2 times20 times100 times✔ 1,000 times

A
2 times
B
20 times
C
100 times
D
✔ 1,000 times

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