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But what if pH = 7?
The solution is considered neutral.
Water is neutral because it spontaneously
dissociates into ions.
low pH -> high concentration of hydrogen ions
and vice versa
high pH -> low concentration of hydrogen ions
This concludes our lesson on pH.
Stay tuned for our next lesson on molarity!
BASE
ACID
pH
- a.k.a potentionmetric hydrogen ion concentration
- The pH scale was defined because of the enormous range of hydrogen ion conentraions found in aqueous solutions.
- Instead of saying the concentration of hydrogen ions is 0.0000000001. We can say pH is 10.
a substance that when added to water decreases the concentration of hydrogen ions
a substance that when added to water increases the concentration of hydrogen ions
ACID: pH = 0 - 6.9
BASE: pH = 7.1 - 14
Question:
Now, how do we calculate pH of a substance?
Answer:
Use the formula: pH = -log[H3O+].
Have no fear, there is a pattern here!
Do you see the pattern?
pH equals the expontional value of concentration.
Now you do not have to worry about those pesky log calculations.