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MHT CET Chemistry question

ChemistryEquilibriumMHT CET

Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations I. 60 mL HCl + 40 mL NaOH II. 55 mL HCl + 45 mL NaOH III. 75 mL HCl + 25 mL NaOH IV. 100 mL HCl + 100 mL NaOH pH of which one of them will be equal to 1 ?

Answer: (D)

Solution

Excess is I: (6-4)/100 = 0.02 M (pH 1.7); II: (5.5-4.5)/100 = 0.01 M

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Question ID VK-059050