Problem 1
a) The proton concentration of a solution is 0.0005 mole/l. What is the pH of this solution?
b) The hydroxide ion concentration of a solution is 0.0005 mole/l, what is the pH of this solution?
Problem 2
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a) The pKa value for hypochlorous acid is 7.45, what is Ka value for the same acid?
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b) The Ka value for acetic acid is 10-4.75, what is the pKa value for the same acid?
Problem 3
Examine dissociation of acetic acid (CH3COOH) and hydrochloric acid (HCl) at pH 5 and 10. – –
Calculate [Cl ]/[HCl] and [Ac ]/[HAc]
Problem 4
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a) What is the oxidation states of sulfur in SO42- and HS- ?
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b) Balance the following redox reaction use the half reactions (you have to develop
the half reactions to get full credit)
SO42- + H+ + CH2O HS- + CO2 + H2O
Problem5
SO42- + H+ + 2CH2O HS- + 2CO2 + 2H2O In above balanced redox reaction, list the following:
Oxidant:
Reductant: