NEET 2018 Chemistry question
Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations : (a) 60 mL HCl + 40 mL NaOH (b) 55 mL HCl + 45 mL NaOH (c) 75 mL HCl + 25 mL NaOH (d) 100 mL HCl + 100 mL NaOH pH of which one of them will be equal to 1?
Answer: (4)
Solution
For each mixture find the excess strong acid and divide by the total volume. (a) mmol of HCl left in 100 mL: M, pH . (b) mmol in 100 mL:
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