a) What is the ph of a buffer prepared by mixing 5.0 g of ammonia (NH3) and 20.0 f of ammonium chloride (NH4Cl) in enough water to form 2.50 L of solution. The Kb of ammonia is 1.76*10^-5.
b) How many moles of sodium hypobromite, NaBrO, should be added to 1.00 L of 0.050M hypobromous acid, HBrO, to form a buffer solution of ph 8.80? assume no volume change when NaBrO is added. Ka of HBrO is 2.50*10^-9.
c) How many grams of sodium lactate, NaC3H5O3, should be added to 1.00 L of 0.150M lactic acid, HC3H5O3 to form a buffer solution with a ph of 3.90? Assume no volume change when the sodium lactate is added. ka of lactic acid is 1.40*10^-4.