Question

Write a summary paragraph discussing this experiment and the results. Use the following questions to help guide the content of your paragraph.

What was your hypothesis? According to your data, was your hypothesis was correct?
Why did some substances require larger additions before a color change was seen? What does this indicate about the strength of the acid or base?
What happened in the final step of the experiment? What does the final color indicate?
To what extent was this experiment useful in determining pH? Could a specific pH be determined using this procedure?
Why are acid and base indicators important? How could they be used in everyday life?

Answer 1

The experiment tested the pH levels of various substances by using universal indicator and observing the color change. The hypothesis was that substances with a pH closer to 7 would require smaller amounts of indicator for a color change compared to substances with more extreme pH levels. The data collected supported this hypothesis, as substances with pH closer to 7 required smaller amounts of indicator. This indicates that the strength of the acid or base affects the amount of indicator needed for a color change. In the final step of the experiment, the universal indicator was added to a substance until the color stabilized, indicating the pH level. The final color observed indicates the pH level of the substance. While this experiment is useful in determining the approximate pH level of a substance, it cannot determine a specific pH. Acid and base indicators are important as they allow us to determine the pH level of a substance, which can be useful in everyday life, such as in pool maintenance or testing the acidity of soil for gardening.

Step-by-step explanation:

Answer 2

• A hypothesis states your predictions about what your research will find. It is a tentative answer to your research question that has not yet been tested. For some research projects, you might have to write several hypotheses that address different aspects of your research question.

• Some substances work only for strong bases or weak bases or strongs acids. Example, if you have a weak base solution (pH=8) and you add phenolphthalein, then you need a lot of phenolpthalein drops to see a pink color change because phenolphthalein is for stronger bases

• 1. liquids such as lemonade clear soda and the clear shampoo would be acidic where as the baking soda dish soap and fertilizer would be basic, my hypothesis was somewhat correct all but the soda was correct by the looks of the colors.
• 2. Some liquids required more because the strength of the acidity or base wasn't very strong thus requiring a larger amount of liquid added to the cabbage indicator.
• 3. At the end of the experiment when the vinegar and baking powder were added together the colors mixed into a mix of the two more purple then the cabbage indicator and there was plenty of bubbles in the solution.
• 4. Not very useful unless you know exactly what the colors indicate. Yes, all that would be needed is a ph scale.
• 5. Acids and base indicators help us identify whether a substance is acidic or basic. They can be used to detect the nature of soil, samples etc which can be helpful.

• Acid-base indicators are most often used in a titration to identify the endpoint of an acid-base reaction. They are also used to gauge pH values and for interesting color-change science demonstrations.