Question

25g of Nacl is dissolved in 500ml of water. find the molality(m) of the resulting solution.​

Answer 1

mass of Nacl dissolved in solvent = 25 gram

volume of solvent = 500 ml = 0.5 litre

Molarity = ?

here Nacl is solute and water is solvent

moles of Nacl = 25 / 58.5 = 0.42

Molarity = no. of moles of solute/volume of sol(lit)

M = o.42 /o.5

M = 0.84 mol/litre.

thnks for asking .......