Which statement best describes the use of a chemical indicator in a titration? O It must be measured to the nearest 0.01 mL.
It must be colored in the acid solution.
O It must measure pH directly at all pH values.
It must change color near the equivalence point.

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.