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BITSAT2013ChemistrySome Basic Concepts of ChemistryActual

How many grams of concentrated nitric acid solution should be used to prepare 250 ~mL of 2.0 MHNO ₃ ? The concentrated acid is 70 % HNO ₃

Options

  1. A90.0 ~g conc. HNO ₃
  2. B70.0 ~g conc. HNO ₃
  3. C54.0 ~g conc. HNO ₃
  4. D45.0 ~g conc. HNO ₃

Correct answer

D. 45.0 ~g conc. HNO ₃

Step-by-step solution

Molarity ( M )= wt 1000 mol. wt. vol ( mL ) 2= wt . 63 1000 250 wt = 63 2 ~g wt. of 70 % acid = 100 70 31.5=45 ~g

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