QJEEAdv03Chc2ef: JEE Advanced 2003 Chemistry - Class 11 JEEAdv03Chc2ef Solution: Calculate the molarity of water if it's density is 1000 kg/m 3

Molarity is calculated by dividing the number of moles of solute in the solution by the volume of the solution in liters.

Given, 1 L of water = 1 kg = 1000 g (because density = 1000 kg m⁻³).

Therefore, the number of moles of solute present

= ${{1000} \over {18}}$ = 55.55 mol of H₂O

So, the molarity is 55.55 mol/1 L = 55.55 M.