Report Questions 1. How do the two types of litmus paper respond to acid, bases and neutral substances? 2. 3. 4. 5. 6. 7. Classify the alum, baking soda, cornstarch, cleanser, salt and aspirin as an acidic, basic, or neutral substance. If you have made a substitution, be sure to note that you did so. How does the cabbage water respond to change in pH? Classify garden lime, sugar and lemon juice as acidic, neutral or basic. Cabbage water will spoil after a few days. How might you make a cabbage indicator with a longer shelf life? According to your cabbage water, what is the pH of baking soda, crushed aspirin, cleanser, garden lime, sugar and lemon juice?