Ionic Equilibrium

According to Arrhenius, what is the definition of an ACID?

• a substance that contains hydroxide and ionizes to produce OH-

• a substance that contains hydrogen and ionizes to produce H+

• a substance that contains hydrogen and ionizes to produce OH-

• a substance that contains hydroxide and ionizes to produce H+

According to Bronsted-Lowry, what is the definition of an BASE?

• a substance that donates a hydrogen (H+) ion

• a substance that donates a hydroxide (OH-) ion

• a substance that accepts a hydrogen (H+) ion

• a substance that accepts a hydroxide (OH-) ion

Which of the following shows the CORRECT conjugate acid base pair?

• HCI (acid) / H₃O⁺ (conjugate base)

• HCI (acid) / CI^- (conjugate base)

• HCI (base) / CI^- (conjugate acid)

• HCI (base) / H₃O⁺ (conjugate acid)

If the pH of a solution is 7 the solution is said to be

• Acidic
• Basic
• Neutral
• Tasty

if a solution has a pOH of 5.2 the [OH-] of the solution is

• 6.3 x 10 ^-6 M

• 7.0 x 10 ^-10 M

• 1.58 x 10^-5 M

• 2 x 10^-5 M

If the [H₃O⁺] of a solution is 6.8 x 10^-8 M, the pH is

• 7.17

• 3.2 x 10^-5

• 7.2

• 7.62

Calculate the pH of solution prepared by dissolving 5.9 x 10⁻⁵ moles of HCl in 1.0 L of pure water.

• 3.77

• 4.77

• 4.23

• 10.23

Calculate the pH of 5.0 x 10⁻⁴ M NaOH solution.

• 3.30

• 10.67

• 11.00

• 4.30

Solutions of each of the hypothetical acids in the following table are prepared with an initial concentration of 0.100 M. Which of the four solutions will have the lowest pH and be most acidic?

• HA

• HB

• HC

• HD

Calculate the approximate [H₃O⁺] concentration in a 0.220 M solution of hypochlorous acid.

K_a for HOCl = 3.0 x 10^-8.

• 1.7 x 10^-4

• 3.7 x 10^-4

• 8.1 x 10^-5

• 1.4 x 10^-7