Question

calculate the molality 6.75% solution of ethanol in water​

Answer 1

The molality of solution = 1.576

Further explanation

Given

6.75% solution of ethanol in water​

Required

The molality

Solution

Assume 100 g solution ,

Ethanol = 6.75 g⇒solute

Water = 93.25 g = 0.09325 kg⇒solvent

Molality = mol solute/kg solvent

mol Ethanol(MW=46 g/mol) :

$\tt mol=\dfrac{6.75}{46}=0.147$

the molality :

$\tt m=\dfrac{0.147}{0.09325}=1.576$