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Title: pH Gizmo Analysis Answers
Description: Easy level notes. Questions from this gizmo have already been graded and answered
Description: Easy level notes. Questions from this gizmo have already been graded and answered
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Name:
Date:
12-17-21
Student Exploration: pH Analysis
Directions: Follow the instructions to go through the simulation
...
Vocabulary: acid, acidic, alkaline, base, indicator, neutral, pH
Prior Knowledge Questions (Do these BEFORE using the Gizmo
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Acids are substances that produce hydrogen ions (H+) when dissolved in water
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A
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What does it feel like if lemon juice gets in your eye?
painful
2
...
Hand soap is an
example of a base
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What does soap feel like?
feels like a smooth rock
B
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What does it feel like if soap gets in your eye?
painful makes me wanna bang my
head against the wall
Gizmo Warm-up
The strength of an acid or base is measured on the pH scale
...
” It is a measure of how many excess H+ ions
there are in a solution
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Acidic substances have a pH below 7,
while alkaline substances (bases) have a pH above 7
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The pH Analysis Gizmo allows you to find the pH of a variety of liquids
...
Wait
until the animation is finished
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Indicators change color in acids or bases
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Compare the paper to the pH color chart
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Is ammonia acidic or alkaline?
alkaline
Reproduction for educational use only
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© 2020 ExploreLearning™ All rights reserved
Activity A:
Measuring pH
Get the Gizmo ready:
● Click Reset
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Goal: Find the pH of 18 common substances
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Test: Use the Gizmo to find the pH of each of the available substances
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Material in the tube
Baking soda
Bleach
Coffee
Cola
Drain cleaner
Hand soap
Juice (lemon)
Juice (orange)
Juice (tomato)
Milk
Milk of magnesia
Oven cleaner
Saliva (human)
Shampoo
Stomach acid
Vinegar
Water (distilled)
Water (ocean)
0-14 pH indicator paper
pH value
Acidic, alkaline, or neutral?
8
alkaline
11
alkaline
4
acidic
2
acidic
14
alkaline
10
alkaline
2
acidic
3
acidic
4
acidic
7
neutral
10
alkaline
14
alkaline
7
neutral
6
acidic
1
acidic
4
acidic
7
neutral
8
alkaline
2
...
A
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What types of substances tend to be alkaline?
in our examples cleaning products look to be more alkaline
Reproduction for educational use only
...
© 2020 ExploreLearning™ All rights reserved
Activity B:
More accurate pH
Get the Gizmo ready:
● Click Reset
...
5-7
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Goal: Find the pH of substances in a more accurate way
...
Test: Before you begin testing with the 4
...
5 paper, list the pH values of the substances below that you
found using the 0-14 pH indicator paper
...
5-7
...
Material in the tube
Coffee
Milk
Oven cleaner
Saliva (human)
Shampoo
Stomach acid
Water (distilled)
4
...
5 pH indicator paper
pH value (0 to 14 paper)
4
7
14
7
6
1
7
pH value (4
...
5 paper)
5
6
...
5
6
...
5
7
2
...
A
...
What is an advantage of using the 4
...
5 paper?
it can be more accurate
C
...
5-7
...
D
...
Public sharing or posting prohibited
Title: pH Gizmo Analysis Answers
Description: Easy level notes. Questions from this gizmo have already been graded and answered
Description: Easy level notes. Questions from this gizmo have already been graded and answered