Hydroxide and Hydrogen Ion Concentrations

Mr. Post provides a tutorial on solving pH problems, demonstrating how to calculate hydrogen and hydroxide ion concentrations from given pH values. The video includes examples with hydrochloric acid and sodium hydroxide, explaining the use of formulas and inverse log functions to find ion concentrations. The tutorial emphasizes understanding the relationship between pH, pOH, and ion concentrations, offering practical tips for using calculators to solve these problems.

What is the pH of the HCl solution discussed in the first example?

• 1.0

• 2.3

• 7.0

• 14.0

Which formula is used to calculate the p value from a given pH?

• pH * p = 14

• pH - p = 14

• pH + p = 14

• pH + p = 7

How do you calculate the hydrogen ion concentration from pH?

• Using the formula pH = log(H+)

• Using the formula pH = -log(H+)

• Using the inverse log function 10^(-pH)

• Using the formula pH = H+ * 10

What is the hydrogen ion concentration for the HCl solution with a pH of 2.3?

• 7.0 * 10^-3 M

• 1.0 * 10^-3 M

• 2.0 * 10^-3 M

• 5.0 * 10^-3 M

What is the hydroxide ion concentration for the HCl solution?

• 1.0 * 10^-12 M

• 7.0 * 10^-12 M

• 2.0 * 10^-12 M

• 5.0 * 10^-12 M

What is the pH of the sodium hydroxide solution in the second example?

• 2.3

• 7.0

• 9.3

• 14.0

What is the p value for the sodium hydroxide solution with a pH of 9.3?

• 3.7

• 5.7

• 4.7

• 6.7

How is the hydrogen ion concentration calculated for the sodium hydroxide solution?

• Using the formula pH = log(H+)

• Using the inverse log function 10^(-pH)

• Using the formula pH = H+ * 10

• Using the formula pH = -log(H+)

What is the hydrogen ion concentration for the sodium hydroxide solution?

• 7 * 10^-10 M

• 1 * 10^-10 M

• 2 * 10^-10 M

• 5 * 10^-10 M

What is the hydroxide ion concentration for the sodium hydroxide solution?

• 2 * 10^5 M

• 5 * 10^5 M

• 1 * 10^5 M

• 7 * 10^5 M