Name, Date, Hr/Per _____________________KEY______________________________________________
Acids & Bases
Visit the class website’s “Helpful Links” section, and click on the “ScienceSpot” link in our class section to bring up
The Science Spot Kid Zone. This is an excellent site to help you with all sorts of science topics!!! Under the heading
“Chemistry,” click on the link that says “acids & bases”, then on “pH factor,” then follow the instructions below.
Site: The pH Factor
Click the purple
“Explore” button on
the main page.
After the pH panel
loads all the way, click
on the button
representing Lemon
Juice.
Record the pH &
other information in
the chart.
Click the buttons for
the other items to
complete the chart.
Substance
Lemon Juice
Baking Soda
Aspirin
Ammonia
Milk of Magnesia
Lava Soap
Borax
Water
Lemon Soap
Vinegar
Tonic Water
Liquid Plumber
pH
4
8
5
10
8
10
9
7
6
4
4
12
Acid, Base,
or
Neutral?
acid
base
acid
base
base
base
base
neutral
acid
acid
acid
base
Color of
pH paper?
2. Tips for the Flying Cabbage ... If you are not sure if a liquid is an acid or base, click and drag the cup
of cabbage juice to the bottle to test the pH. Click and drag the bottle of liquid to the clear cup in
front of the alien to pour a drink.
Color of
Cabbage Water?
3. How did you do? If you kept everyone alive, click the “Main Menu” button. If you didn’t keep
everyone alive, click the “Try Again” button.
orange
yellow-green
dark orange
dark green
pink
green
pink
green
Challenge 3 – Go back again to the main menu of the site, then click the button for Challenge 3 to test
your knowledge of acids and bases.
1. Click and drag the cup of cabbage juice to each drink on the tray to check the pH.
light yellow-green
yellow-green
orange
green
yellow
orange
orange
orange
dark brown
yellow
red
purple
purple
red/pink
red
tan
[bottom portion of strip]
Now, return to the Chemistry section of the Kid Zone, and click on the link, which says, “Acids & Bases.”
On the page which comes up, click on the “Alien Juice Bar (pH)” link to take you to the activity.
Site: Alien Juice Bar
Challenge 1 - Click the button for Challenge 1 to learn more about acids and bases.
1. Click the cup with the purple juice in it and drag it to the different liquids to check the pH. What
happens to the color in each one?
a. Lemon Juice - _pink_
b. Window cleaner - _green_
c. Water - _purple_
2. Drag each liquid to the correct shelf before clicking the
“Check Me” lever. Record your results in the table to the
right.
3. Click the “Test More” button under the lever. When you
are finished checking and recording all of those liquids, click
the “Check Me” lever. Once you get them all correct, click
the “continue” button to return to the main menu.
2. To change the pH of a liquid, click a bottle of liquid from the shelf and drag it to a glass. Watch the
pH increase or decrease.
3. If you need a lower/higher reading, keep adding acids/bases until the pH is in the correct range.
Once all the drinks are correct, you will see a “Continue” button. Click it to move on to the next
set of drinks. Continue adding acids and bases to the drinks until you get the pH at the correct
level. HINT: For this section, neutral equals anything between 6.80 and 7.20!
4. Which acid and base caused the biggest changes in pH? (Based on one click and drag!)
What is the trend of the Cabbage water? Color of acids: __reds__ Color of Bases: __greens__
[directions for challenges 2 & 3 on the back of this sheet]
Challenge 2 – Go back to the main menu of the site, and click the button for Challenge 2 to use your
knowledge of acids and bases.
1. Read the directions before clicking the “Start” button!
Acid, Base, or
Neutral?
Water
neutral
Lemon Juice
acid
Window Cleaner
base
Coffee
acid
Mouthwash
base
Cough Medicine
base
Liquid Soap
base
Orange Juice
acid
Toothpaste “Juice”
base
Soda Pop
acid
Tea
acid
Substance
a. Acid - __lemon juice? [hard to tell…]__
b. Base - _liquid soap__