Unformatted text preview: 2. Calculate [H + ] and pH of a 0.1F solution of Na 2 A (same acid as in problem 1). Please, justify explicitly all approximations. Do not neglect the 2 nd dissociation. 3. Derive an expression for [H + ] for a mixture of two weak monoprotic acids with dissociation constants K 1 , K 2 and formal concentrations c 1 , c 2 . Come up with useful approximations. 4. How many ml of solution (e) should you add to 20ml of solution (a) in problem 1) in order to get pH=4? Do it the hard way and check your result with the easy way. 5. Write charge and mass balance of a 0.1F solution of NaHSO 4 ....
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 Fall '10
 yildiz
 pH, Stoichiometry, Chem, ml, k2

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