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Q.

A commercially sold conc. HCI is 35% HCI 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=1amu )

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a

 12.5 M

b

14.0 M

c

10.2 M

d

18.2 M

answer is C.

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Detailed Solution

Let total volume =1000 mL=1 L

The total mass of solution =1460 g

mass of HCl=35100×1460

moles of HCl=35×1460100×36.5

So molarity =35×1460100×36.5=14M

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