1. Part two of acid/base pH calculations
Student will :
if given pH calculate the
hydronium ion concentration hydroxide ion concentration
molarity of a solution
Ws. 19.2

2. “If given pH…find antilog” negative # = [hydronium conc.]
If pH is what is the [hydronium] or the molarity?
“If given pH…find antilog”
negative # = [hydronium conc.]
enter [ E -8 ]
“secret….hydronium concentration is the molarity for an acid”
BUT::::: if they also ask for hydroxide concentration one must use the equilibrium constant for water:::::::::
Equilibrium Constant for water is
Kw = 1 x 10-14
Kw = [H+] [OH-]
Yellow
2nd
log

3. The pH of an orange is 4.0pH. What are the [H30] and [OH] in this fruit? What is its Molarity?

4. 2. Lemons have a pH What are the hydronium and the hydroxide concentrations? What is its molarity?

5. What is the molarity if the pH is 12
What is the molarity if the pH is 12.9 for a Calcium hydroxide solution?

6. 4. Given pH 5.5 for an acid solution. What is the molarity?

7. 5. Given pH 8.8 for a base solution what is the molarity?

8. 6. Given pH 6. 7, what is the molarity
6. Given pH 6.7, what is the molarity? What are the [hydronium] and the [hydroxide] ?

9. If the [H3O] for butter is 6.0 x 10-7
is it acidic, basic, or neutral?

10. 8. If given the [OH] as 3.16 x 10-11, what is the hydronium concentration? What is the pH?

11. 9. If given the [H3O] as 1.6 x 10-6, what is the hydroxide concentration? What is the pH?

12. Remember: 3 formulas: pH=-log[H3O]
pOH=-log[OH]
pH + pOH = 14
Remember: [H3O] is hydronium concentration
or…..molarity for an Acid
or…..H+ proton concentration
Remember: [OH] is hydroxide concentration
or molarity for a base
Remember: if given pH use antilog to calculate [H3O] [OH]
put pH in as negative number
Remember: Kw = 1x10-14
Kw = [H3O] [OH]

13. If the pH=5.2 what is the [OH]?
6.31 x 10-6
1.58x 10-9
8.8 x 10 -7

14. Part two of acid/base pH calculations
Student will :
if given pH calculate the
hydronium ion concentration hydroxide ion concentration
molarity of a solution
Ws. 19.2