Question

HELP ASAP Will try to give brainliest

Mark decided to investigate some household materials using the phenolphthalein solution. He
placed 10 drops of each liquid or a small amount of solid (just enough to cover the tip of the spatula)
in 2 mL of distilled water.

Answer 1

Answer:

The solutions that showed a color change upon the addition of phenolphthalein are bases. However, the lack of a change in color is NOT sufficient evidence to identify the other items as acids. This would only work if all substances were either acids or bases, which is not the case. Mark needs another indicator that shows a color when it is in an acid solution to support his conclusions.

Answer 2

No reasonable general conclusion can be drawn from Mark's work because there is no consistent pattern in the results.

If we look at the table carefully, we will notice that the table lacks consistency. What color can we definitely expect when a substance is acidic? we can not answer that question from the table.

Sometimes a substance is colorless after adding phenolphthalein and sometimes the substance is pale yellow after adding phenolphthalein and the same inference of acid substance is invoked in each case.

This leads to a lack of pattern and logic in the results therefore no reasonable conclusion can be deduced from the table.

Learn more: https://brainly.com/question/14865356