Online Assessment
Instructions
1) Type in your first and last name in the
“Name” box in the top-left corner.
2) Next type in your teacher’s name in
the “ID” box.
3) Then type in your school’s full name in the
“Email” box.
4) Select the best answer for each question.
5) When you
are finished click the “Grade and Submit” button.
6) The grade will be emailed
to your teacher.
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1.
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NOTE: This assessment is only for Mr.
Elliott’s students.
---If you are not one of Mr. Elliott’s students then please go
back to the website and click on the link for other teachers. Thanks!
BASE QUESTION
While working on a pH lab activity in science class, Alex spilled some strong
acid (pH of 2) on the work table.
What kind of substance could he use to neutralize this acid
before wiping it up?
a. | Spray some orange juice on the acid. | c. | Pour vinegar on it to neutralize
it. | b. | Use a substance with a pH of 13. | d. | Use a substance with a pH of
7. |
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2.
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BASE
QUESTION
We come in contact with and use a variety of
acidic and basic substances all the time. What do these three household chemicals have in
common?
a. | They all taste sour. | c. | They all turn litmus paper red. | b. | They are all
poisonous. | d. | They all have a
pH above seven. |
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3.
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BASE
QUESTION
Cabbage juice can be used as an acid-base indicator. If you pour
a highly acidic liquid into cabbage juice, the combination will turn red. If you pour a basic liquid
into cabbage juice, the combination will turn green or yellow.
Which of the following
substances will turn yellow when cabbage juice is added?
a. | bottled water | c. | substance with a pH of 11 | b. | vinegar | d. | substance with a pH of 6 |
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4.
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BASE
QUESTION
Which following statement could only be
accurately placed in the base circle?
a. | Is common in fruit juices. | c. | Can be found in the
stomach | b. | Can conduct electricity | d. | Found in many cleaners like bleach |
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5.
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BASE
QUESTION
Nick’s science teacher asked him to
classify various household substances according to their pH level.
Which classification should Nick use for baking soda (pH 9) according the
chart shown above?
a. | strong acid | b. | weak base | c. | strong base | d. | weak
acid |
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6.
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BASE
QUESTION
Gardeners and farmers understand that plants have specific pH requirements.
Most plants thrive in soil that is slightly acidic, neutral, or slightly basic. Imagine your garden
soil is very acidic with a pH of 3.5.
How can you raise the
pH of your soil to a level where your plants will have a good chance of surviving?
a. | Add organic matter like peat moss or humus. | b. | Add a fertilizer
like phosphorus. | c. | Water frequently to wash away the acid. | d. | Add a base like
limestone or calcium carbonate. |
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7.
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BASE
QUESTION
Acid-Base
Indicators | Indicator | Color in Acid | Color in Base | | Litmus | Red | Blue | | Bromthymol
blue | Yellow | Blue | | Methyl red | Red | Yellow | | Phenolphtalein | Colorless | Pink | | | |
Jordan dipped a strip of red litmus paper into a liquid, and the paper turned
blue.
This color change indicates a pH in the _______ range (acidic or basic) and
an excess of ___________ (hydronium or hydroxide) ions in the liquid.
a. | basic, hydroxide ions | c. | acidic, hydroxide ions | b. | basic, hydronium
ions | d. | acidic, hydronium
ions |
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8.
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BASE
QUESTION
Milk of magnesia is an alkaline medicine that you can purchase
at grocery stores and pharmacies.
What happens when you drink milk of magnesia for an upset
stomach?
a. | It cleanses the gastro-intestinal tract of harmful bacteria. | b. | It neutralizes
excess stomach acid, and raises the pH level. | c. | It is a pain killer like Aspirin, Ibuprofen,
and Acetaminophen. | d. | It lowers the pH level in your stomach, and
numbs your nervous system. |
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9.
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BASE
QUESTION
The pH scale reveals the acidity or
alkalinity of various substance ranging from zero to fourteen. According to this simplified pH
scale, which of the following substances is the strongest base?
a. | Blood | b. | Bleach | c. | Lemon Juice | d. | Saliva |
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10.
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BASE
QUESTION
Where in this Venn diagram would we add the
phrase has a pH range from 7.1 to 14?
a. | With letter B | c. | With letter A | b. | With letter D | d. | With letter C |
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