17. Acid and Base Equilibrium

Calculate [OH⁻] of a lemon juice solution at 25°C with a [H⁺] = 5.7 × 10⁻⁴ M.

Which of the following solutions will have the lowest concentration of hydronium ions?

Which of the following statements about aqueous solutions is/are true?

What is the Kw of pure water at 20.0°C, if the pH is 7.083?

Calculate the pH of 50.00 mL of 4.3 x 10^-7 M H₂SO₄.

Determine the pH of a solution made by dissolving 6.1 g of sodium cyanide, NaCN, in enough water to make a 500.0 mL of solution. (MW of NaCN = 49.01 g/mol). The Ka value of HCN is 4.9 x 10^-10.

OI⁻      OCl⁻      OBr⁻

A solution of NaOH was prepared in a chemistry lab and the pOH was determined to be 9.3. What is the concentration of OH⁻ ions of this basic solution?

A 345 mL bottle of antacid (Mg(OH)₂) contains 1.45 × 10⁻² moles of hydroxide ions. Determine pH and pOH of the antacid.

Which of the following statement(s) on aqueous solutions is/are correct?

a) aqueous solutions have a pH of 7

b) as concentration of hydronium ion increases, concentration of hydroxide ion decreases

c) solutions of weaker acids generally have a higher pOH then solutions of stronger acids

d) pH of pure water equals to 7 at 35º C.