Question

6gm urea is dissolved in 100 ml then molarity of solution will be

Answer 1

Hi Utkarsh
Molarity may be defined as the concentration of a solution in terms of moles.
Molarity = moles of solute / quantity of solution ( in litres )
now we will find moles of solute
mole = given mass / molar mass
mole = 6 / 60 .......(as molar mass of urea is 60gm)
no. of moles of urea = 0.1...........( 1 )
quantity os solution = 0.1....(in litres).........( 2 )
Now by substituting values of ( 1 ) and ( 2 ) in molarity formula...
0.1 / 0.1
=   1 moles / litres
Hence molarity of 6gm urea dissolved in 100ml is 1 moles/litres

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