EXPERIMENT: THE CABBAGE INDICATOR
Here are your goals for this lesson:

Use indicator for each substance to determine if substance is an acid or a base
Summarize results and the experimental method

You can use the natural indicator in red cabbage juice to determine which household liquids are acids or bases. If no change in the color of the cabbage juice takes place, the liquid is neither an acid nor base; it is neutral.

Acids and bases are opposites. When an acids and base are mixed, they neutralize each other. You can use an indicator to see the neutralized reaction. The cabbage juice will change color when the liquids are neutralized.

Online Lab
This video will demonstrate how an indicator, in this case, cabbage indicator, can be used to determine whether a solution is acidic or basic. As you watch the video, remember to record your data and observations to use to present your findings.



Compile a summary of your findings from this experiment. Include your hypothesis, observations, data, and conclusions. Be sure to answer the questions below as well as explaining the method and results.

What liquids were used in the investigation?

Vinegar is an acid. Which liquids produced colors like vinegar?

Baking soda is a base. Which liquids produced colors like baking soda?

Did you see any that did not fit into either color group? If so which one(s)?

Could you determine the relative pH of the liquids by the varying color of the cabbage indicator?

Could you add drops of a solution that was indicated acid into a solution that was indicated base until they became neutral?

How would you be able to tell when a neutral pH was obtained?

What did you find out from this investigation? Be thoughtful in your answer.