Anna is conducting an experiment using a pH indicator that is red at low pH, green at neutral pH and purple at high pH. She starts with a green solution. When she adds compound X to her solution it turns purple. Then she adds compound Z to the solution and it turns green. She adds more Z, the solution remains green. These observations suggest X is _ _ and Z is .

Question

Quizplus · Accepted Answer

Compound X turns the solution purple, which indicates that it is a base. Compound Z turns the solution green, which indicates that it is an acid. However, when more Z is added, the solution remains green, which indicates that Z is a buffer.

Anna Is Conducting an Experiment Using a PH Indicator That