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JEE Main202226 Jun 2022Morning ShiftChemistrySome Basic Concepts of ChemistryActual

A commercially sold conc. HCl is 35 % HCl by mass. If the density of this commercial acid is 1 . 46 g / mL , the molarity of this solution is : (Atomic mass : Cl = 35 . 5 amu , H = 1 amu )

Options

  1. A10 . 2   M
  2. B14 . 0   M
  3. C12 . 5   M
  4. D18 . 2   M

Correct answer

B. 14 . 0   M

Step-by-step solution

Molarity M = x × d × 10 m B = 35 × 1 . 46 × 10 36 . 5 = 14   M m B = molecular mass of solute d = density of the solution in g / L x = % solute by mass.

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