Multiple Choice
What is the pH of a 0.461 M benzoic acid (C6H5CO2H) solution if the acid dissociation constant (Ka) is 6.5 x 10^-5?
17. Acid and Base Equilibrium
pH of Weak Acids
Back17. Acid and Base Equilibrium
pH of Weak Acids
- Multiple ChoiceDetermine the pH of a buffer solution prepared by dissolving 0.20 mol of formic acid (HCHO) and 0.80 mol of sodium formate (NaCHO) in enough water to make 1.0 L of solution. The pKa of formic acid is 3.75.
- Multiple ChoiceWhat is the pH of a 0.10 M solution of H₂SO₃, given that its pKₐ is 1.77 and the change in concentration is small?
- Multiple ChoiceWhat is the pH of the solution when 20.00 mL of 0.1563 M aniline hydrochloride (C6H5NH3+Cl-) is titrated with 15.00 mL of 0.1249 M NaOH? (Ka for aniline = 2.40 x 10^-5)
- Multiple ChoiceWhat is the pH of a 0.090 M H2CO3 solution, given that the first dissociation constant (Ka1) is 4.3×10^-7 and the second dissociation constant (Ka2) is 5.6×10^-11?
- Multiple ChoiceWhat is the pH of a 0.210 mol L⁻¹ solution of a weak monoprotic acid with a dissociation constant (Ka) of 3.9×10⁻²?
- Multiple ChoiceWhat is the H₃O⁺ concentration of a 0.250 M hydrofluoric acid (HF) solution, given that the acid dissociation constant (Ka) for HF is 6.8 x 10⁻⁴?
- Multiple ChoiceWhat is the pH of a 0.010 M HNO₂ solution, given that the acid dissociation constant (Ka) for HNO₂ is 4.0 x 10⁻⁴?
- Multiple ChoiceWhat is the pH of a solution that is 8.0 × 10⁻² M in H₂CO₃, given that the first dissociation constant (Ka1) of H₂CO₃ is 4.3 × 10⁻⁷?
- Multiple ChoiceFind the pH of a solution that is 9.0×10⁻² M in H₂CO₃. Express your answer using two decimal places.
- Multiple ChoiceWhich formula can be used to calculate the pH of a weak acid given its pKa and concentration?
- Multiple ChoiceIf 17.0 mL of glacial acetic acid (pure HC2H3O2; Ka=1.8×10⁻⁵) is diluted to 1.65 L with water, what is the pH of the resulting solution? The density of glacial acetic acid is 1.05 g/mL.
- Multiple ChoiceIf a solution of HF (Ka = 6.8 × 10⁻⁴) has a pH of 2.50, what is the initial concentration of hydrofluoric acid in the solution?
- Multiple ChoiceThe pH of a solution containing HIO3 (Ka = 1.7 × 10⁻¹) and KIO3 is 1.00. If the molarity of HIO3 is 0.025 M, what is the molarity of KIO3?
- Multiple ChoiceThe venom of stinging ants contains formic acid, HCOOH, with a dissociation constant (Ka) of 1.8 × 10⁻⁴ at 25 °C. What is the pH of a 0.055 M solution of formic acid?