An acid is added to pure water. The difference between the pH of the pure water and the acid-water solution is 2. What is the pH of the acid-water solution?

a. 9
b. 7
c. 5
d. 2

Question

An acid is added to pure water. The difference between the pH of the pure water and the acid-water solution is 2. What is the pH of the acid-water solution?
  
a. 9
b. 7
c. 5
d. 2

anonymous · Answer

5.  The pH of water (which is neutral) is 7.  They ask for the difference, which means subtraction, however, we know that acids are less than 7 when it comes to pH so the answer has to be 5.

anonymous · Answer

thank you!
do you know this at all?


The [H3O+] for a solution is 8.3 x 10-5 M. The pH of the solution would be closest to _____.
 
a. 3
b. 5
c. 7
d. 9

anonymous · Answer

Not a clue.  Lol.  Sorry