A pH = 3.46 is determined for a buffer containing 0.032 M HF and 0.032 M KF.  What is the pKa of HF?

Identify the base able to deliver two hydroxide ions in water. i) H2S ii) Sr(OH)2 iii) Fe(OH)3 iv) Al(OH)4

Calculate the pH of a solution that is 0.111 M in sodium formate (NaHCO2) and in formic acid (HCO2H). The Ka of formic acid is 1.77 × 10-4.

Calculate the pH of a solution that is 0.115 M HC2H3O2 and 0.160 M KC2H3O2. The Ka for HC2H3O2 is 1.8 × 10-5.

Determine the pOH of a 0.141 M RbOH solution at 25°C.

Calculate the pH of a solution that is 1.58 M HClO and 0.099 M NaClO. The Ka for HClO is 2.9 × 10-8.

Which of the following is a weak base? i) Ca(OH)2 ii) ethylene glycol iii) NH3 iv) HCO2H

When titrating a monoprotic strong acid with a weak base at 25°C, the

Determine the Ka for CH3NH3⁺ at 25°C. The Kb for CH3NH2 is 4.4 × 10-4.

Which of the following salts is the least soluble in water? i) AgBr, Ksp = 5.4 x 10-13 ii) AgCl, Ksp = 1.8 x 10-10 iii) AgSCN, Ksp = 1 x 10-12 iv) AgI, Ksp = 8.5 x 10-17