Question

what will be the molarity of a solution, which contains 5.85g of NaCl per 500ml?

Answer 1

Molarity is number of moles of solute per liter of solution.

As here solute is NaCl.
Its molecular mass is 58.5.

So no. of moles is=Mass/molecular mass=5.85/58.5=0.1 moles.

So molarity=0.1/0.5 liters=0.2 moles/liter.

So the answer is 0.2 moles/liter.

Thanks
Tripathy.

Answer 2

molarity= no.of moles/volume of solution in litre
no. of moles =given mass / molar mass
therefore
moles of Nacl = 5.85/58.5=0.1
now,
molarity = 0.1/0.5=1/5= 0.2 M