6. Using the pH scale, what numbers indicate an acid? What numbers indicate a base? If one acid has a pH of 2 and another has a pH of 4, which is a stronger acid?

Question

6. Using the pH scale, what numbers indicate an acid?  What numbers indicate a base?  If one acid has a pH of 2 and another has a pH of 4, which is a stronger acid?

anonymous · Answer

A substance with a pH of 2 is more acidic than a substance with a pH of 4. Any measurement below 7 on the pH scale is acidic.

anonymous · Answer

@tallymark124

Here's how I memorized it:

A comes before B, so:

Acids<-------------------------7(Neutral) ------------------------------> Bases

anonymous · Answer

a) pH = 4 means the hydrogen ion concentration is 10-4 ( 10 to the power of -4)
b) pH = 2 means the hydrogen ion concentration is 10-2  ( 10 to the power of -2)
 so which has higher hydrogen ion concentration a ( which is 0.0001) or b ( which is 0.01)