Pka Acid Strength

True or False? The stronger the acid, the larger the value of the K_a.

• True

• False

Select ALL of the strong acids.

• HClO₄

• HNO₂

• HF

• HI

• HNO₃

What is the conjugate acid of HCO₃^1-?

• CO₃

• H₂CO₃

• CO₃^2-

• H₂CO₃^2-

Estimate the pH of a 1.5 x 10^-8 M solution of HCl.

• 5.85

• 7.85

• 8.15

• 9.5

Estimate the pH of a barium hydroxide solution with a concentration of 2.5 x 10^-2 M. Assume complete dissociation.

• 12.5

• 1.75

• 1.5

• 8.5

Estimate the pKa for an acid, HA, if its K_a is 4.5 x 10^-11 M.

• 11.45

• 4.5

• 10.55

• 15.5

If a weak acid, HA, has a K_a = 2.9 x 10^-5, what is the K_b for its conjugate base, A^-?

• 3.8 x 10^-8

• 3.4 x 10^-10

• 1.4 x 10^-7

• 1.4 x 10^-9

Which two species would be identified as Bronsted-Lowry bases?

• HF and F^-

• NH₃ and F^-

• NH₃ and NH₄⁺

• NH₄⁺ and F^-

Which of these "HOY" acids is the weakest?

• HOCl

• HOI

• HOBr

• All of these are equally strong.

Which of these is the strongest Bronsted base?

• F^-

• Cl^-

• Br^-

• I^-

Tags

NGSS.HS-PS1-1