When an acid, like hydrochloric acid, is added to water, what happens to the ph?

thereby decreasing the pH and increasing the acidity of water. pH is a measure of acidity or basisity (alkalinity) of a solution.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this