Print this list and try working these problems before checking your answers and looking at the hints.

• V-4(1). What is the pH of a 0.200 M solution of NH₄Cl in water?
  The K_b of ammonia is 1.8x10^-5.

• V-4(2). What is the pH of household bleach, which is 5.25% sodium hypochlorite, NaClO, by weight? The K_a of hypochlorous acid is 3.0x10^-8.
  

  Useful information:

  mol. wt. NaClO: 74.44 g/mol density of water: 1.00 g/mL

• V-4(3). What is the pH of a 0.320 M solution of sodium bicarbonate, NaHCO₃? Carbonic acid has the following K_a values:

  H₂CO_{3 (aq)} H⁺_(aq) + HCO₃^-_(aq)       K_a = 4.45x10^-7

  HCO₃^-_(aq) H⁺_(aq) + CO₃^2-_(aq)         K_a = 4.7x10^-11