2. Write the equilibrium expression for HF + H2O → F- + H3O+
(i) Find [H+] of a 0.056 M...
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2. Write the equilibrium expression for HF + H2O → F- + H3O+
(i) Find [H+] of a 0.056 M hydrofluoric acid solution. Ka = 1.45 x 10-7
(ii) Then calculate the pH
3. Write the equilibrium expression for NH3 + H2O → NH4+ + OH-
4. Write the equilibrium expression for H2S + H2O → H3O+ + HS- and
(i) Calculate the [H3O+] in a 0.45 M solution of hydrogen sulphide (H2S). Ka = 2.05 x 10-6,
(ii)Then calculate the pH of H2S?
5. Write the equilibrium expression for NH3 + H2O g NH4+ + OH-
(i) Calculate the [OH-] in a 0.60 M solution of ammonia (NH3) Kb = 6.83 X 10-4,
(ii)Then calculate the pHof NH3 (Base)
6. The pH in a 0.25 M solution of the acid HBrO is 4.65 . Using this, Write the equilibrium expression of
HBrO and calculate the value of Ka for the acid HBrO
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Answers: 3
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