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Unformatted text preview: mples: + – 1. The [H3O ] of a liquid detergent is 1.4 x 10 9 M. Calculate its pH. + – pH= – log [H3O ] = –log [1.4 x 10 9]= – (–8.85) =8.85 + 2. The pH of black coffee is 5.3. Calculate its [H3O ]. + [H3O ] = antilog (–pH) = 10 –pH = 10 –5.3 = 5 x 10 –6 + – 3. The [H3O ] of a solut ion is 3.5 x 10 3 M. Calculate its pH. + 4. The pH of tomato juice is 4.1. Calculate its [H3O ]. – – 5. The [OH ] of a cleaning so lut ion is 1.0 x 10 5 M. What is the pH of this so lut ion? + [H3O ] = pH= + 6. The pH of a solut ion is 11.50. Calculate the [H3O ] for this so lut ion. 8 Chemistry 52 Chapter 15 THE pOH SCALE · Similar to pH, a convenient way to designate the basicity of a solut ion is the pOH scale. – pOH = – log [OH ] · In aqueous solut ions, the sum of pH and pOH of a solut ion equal to 14. pH +...
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