If the pH is decreased from 7 to 6, it means that the 1..concentration of Hydrogen ions is 10 less

2...concentration of Hydrogen ions is 10 more

3.it is the same

2...concentration of Hydrogen ions is 10 times more

Explanation:

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >