Experiment on acid and bases. come up with reactions colorsEXPERIMENT
Peel of six big cabbage leaves and put them in a blender with 12 cups
oF water. LiquiFy!
Depending on how much Red Cabbage Indicator
you want to make use the optimum ratio of one cabbage leaf to
two cups of water.
Pour the purplish cabbage liquid through a strainer to ±lter out all oF
the big chunks oF cabbage. Doesn’t cabbage juice smell great? Save the
liquid For the experiments to Follow.
Set out three or Four test tubes or glasses, side by side. ²ill each
container halF Full with cabbage juice.
Since you know that vinegar is an example oF an acid, add a little
vinegar to the ±rst glass oF cabbage juice. Stir with a spoon and notice
the color change to red, which indicates that vinegar is classi±ed as an
In the second glass add a teaspoon oF washing soda or laundry
detergent. Notice how the liquid turns green, indicating that this
chemical is a base.
Keep these two glasses of red and green
liquid for future reference.
Try adding other “test chemicals" to a small amount oF cabbage juice
and note the color change to determine iF the chemical is an acid or a
base. Using the image below determine the pH.
TAKE IT FURTHER!
Use your cabbage juice indicator to test the acid or base properties oF
other common substances. You might want to try orange juice,
lemonade, milk, salt, ammonia, or soap. ²rom the images below
determine the pH oF the solutions you tested. Be sure to keep some oF
the "Fresh" cabbage juice For the next experiment.
HOW DOES IT WORK?
Some substances are classi±ed as either an acid or a base. Think oF
acids and bases as opposites - acids have a low pH and bases have a
high pH. ²or reFerence, water (a neutral) has a pH oF 7 on a scale oF 0-