A solution with a pH of 2.91 is prepared by dissolving 1 g. of benzoic acid, HC7H5O2, a weak acid, in 350 mL of water. What is Ka of benzoic acid ?

A solution contains 0.302 M ammonium bromide and 0.201 M ammonia. The pH of this solution is

(a) A 50.0 mL solution is prepared to be 1.29 M acetylsalicylic acid. In the first step, 8.55 mL of NaOH is titrated into the solution until the pH is exactly 5.0. What is the concentration of the titrant (NaOH)? (b) In the second step, enough 5.85 M nitric acid is added to the solution after the titration in part (a) is complete until the pH is one unit lower than the pKa of acetylsalicylic acid. What volume (mL) of nitric acid was added?

A 0.018 M solution of salicylic acid, HOC6H4CO2H, has the same pH as 0.0038 M HNO3solution. (a) Write an equation for the ionization of salicylic acid in aqueous solution. (Assume only the –CO2H portion of the molecule ionizes.) (b) What is the pH of solution containing 0.018 M salicylic acid? (c) Calculate the Ka of salicylic acid.

A diprotic acid, H₂A, has Ka1 = 3.4 × 10⁻⁴ and Ka2 = 6.7 × 10⁻⁹. What is the pH of a 0.46 M solution of H₂A?

The pH scale for acidity is defined by pH = - log1o H+] where H is the concentration of hydrogen ions measured in moles per liter (M). (A) The pH of ammonia is 11.0. Calculate the concentration of hydrogen ions in moles per liter (M). [H*] M (B) The pH of apples is 3.0. Calculate the concentration of hydrogen ions in moles per liter (M). [H*] = M

What volume of water must be added to a 24.28 mL solution of a pH = 1.46 solution of HClO4 to raise the pH to 3.37?

A 0.021 M solution of a weak acid (HA) has a pH of 4.19. What is the Ka of the acid?

Phenol, C6H5OH, is used as a disinfectant. The pH of an aqueous phenol solution was measured at 4.72. Is phenol acidic; neutral or basic. Calculate the [H3O+], [OH-] and pOH of the solution?

(a) Papaverine hydrochloride is an alkaloid drug used as a muscle relaxant, particularly for acute myocardial infarctions and angina It is a weak acid. If a 0.205 M solution of papaverine hydrochloride has a pH of 3.31, what is its Ka?