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Suppose that pH of monobasic and dibasic acid is the same. Does this mean that the molar concentrations of both acids are identical ? |
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Answer» Even if monobasic acid and dibasic acid give same pH, their molar concentrations are different. One mole of monobasic acid like HCl gives 1 mol of H+ while one mole of dibasic acid gives 2 mol of H+ in solution. Hence the concentration of dibasic acid will be half of the concentration of monobasic acid. For example, for same pH. [Monobasic acid] = [Dibasic acid]/2. |
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