3 Questions:
1)What is the pH of A solution containing 0.483 M potassium nitrite and 5.38E-2 M nitrous acid.
2)In the laboratory, a general chemistry student measured the pH of a 0.589 M aqueous solution of hypochlorous acid to be 3.861. Use the information she obtained to determine the Ka for this acid.
3)What is the pH of an aqueous solution of 0.421 M morphine
1) pH = pKa + log(salt/base)
= 3.25 + log(0.483/0.0538)
= 3.25 + 0.95
= 4.2
2) [H+]= (Ka*C)^1/2 ([H+]= 1.37 x10^-4 from pH value given )
Ka *C = [H+]^1/2
= (1.37 X10^-4)^1/2
Ka = (1.17 X10^-2)/0.589 = 1.98 X10^-2
3) [OH-] = (Kb*c)^1/2
= (1.62 X 10^-6 *0.421)^1/2
= 8.17 X 10^-4
pOH = -log(8.17 x10^-4)
= 3.09
pH = 14-3.09 = 10.91
3 Questions: 1)What is the pH of A solution containing 0.483 M potassium nitrite and 5.38E-2...
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