(20 points)
a student had a sample of pure water, and added an unknown substance to it. the student notice that the hydroxide ion concentration in the solution increased as the substance was added. what is true qbout this newly formed solution?

a. it is basic
b. it is acidic
c. it is a buffer
d. it has a ph of 7

An aqueous solution of calcium hydroxide is standardized by titration with a 0.120 m solution of hydrobromic acid. if 16.5 ml of base are required to neutralize 27.5 ml of the acid, what is the molarity of the calcium hydroxide solution?

Which statement is a reason to support population regulation? a) it is unethical for us to control birth control rates b) humans have the freedom to produce as many children as desired c) the gap between the rich and poor has been narrowing since 1960 d) billions more people on the earth will intensify many environmental and social problems

Asolid that forms and separates from a liquid mixture is called