Substances, Mixtures, and Solubility - McGraw-Hill Higher Education

4. Add ten drops of the cabbage juice indicator to each of
the solutions to be tested. Gently agitate or wiggle each
test tube to mix the cabbage juice with the solution.
5. Observe and record the color of each solution in your
data table.
Analyze Your Data
1. Compare your observations with the table above.
Record in your data table the relative acid or base
strength of each solution you tested.
2. List the solutions by pH value starting with the most
acidic and finishing with the most basic.
Determining pH Values
Cabbage
Juice Color
Conclude and Apply
1. Classify which solutions were acidic and which were basic.
2. Identify which solution was the weakest acid. The strongest base The closest
to neutral
3. Predict what ion might be involved in the cleaning process based upon your
data for the ammonia, soap, and borax soap solutions.
Form a Hypothesis
Form a hypothesis that explains why the borax soap solution was less basic than an
ammonia solution of approximately the same concentration.
Relative Strength
of Acid or Base
strong acid
medium acid
weak acid
neutral
weak base
medium base
strong base
Use your data to create labels for the
solutions you tested. Include the relative
strength of each solution and any other
safety information you think is important
on each label. For more help, refer to the
Science Skill Handbook.
LAB 241