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A 0.4047 g sample of a primary standard grade pottasium hydrogen phthalate (MM = 204.23) was dissolved in distilled H2O. The solution required 22.42ml of the NaOH solution to reach the phenolpthalein end point. (a) Calculate the No. of moles of KHP ? (b) How many moles of NaOH will react with the KHP in dissolved water ? (c) Calculate the molarity of the NaOH solution?

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