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3.0 molal NaOH solution has a density of...

`3.0` molal `NaOH` solution has a density of `1.110 g//mL`. The molarity of the solution is:

Text Solution

Verified by Experts

3 molal solution of NaOH means 3 moles of NaOH are dissolved is 1000 g of water.
`"But 3 moles of NaOH"=3xx40g=120g`
`therefore" Total mass of the solution "=" Mass of solvent"+"Mass of solute"=1000g+120g=1120g`
Density of solution = `"1.110 g mL"^(-1)`
`therefore" Volume of solution"=("Mass")/("Density")=(1120g)/(1.11"g mL"^(-1)=1009mL=1.009L`
`"Molarity of the solution "=("Moles of solute")/("Volume of solution in L")=("3 mole")/("1.009 L")=2.97M.`
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