What is the molality of ethanol in a solution made by dissolving 7.30 g of ethanol,C₂H₅OH,in 53.6 g of water? A)0.00550 m B)0.500 m C)2.96 m D)400 m

Question

Quizplus · Accepted Answer

First, we need to calculate the moles of ethanol:

moles of ethanol = mass / molar mass = 7.30 g / 46.07 g/mol = 0.1584 mol

Next, we need to calculate the mass of water:

mass of water = 53.6 g

Now we can use the formula for molality:

molality = moles of solute / mass of solvent (in kg)

We have the moles of solute (ethanol), but need to convert the mass of water to kg:

mass of water in kg = 53.6 g / 1000 g/kg = 0.0536 kg

Therefore:

molality = 0.1584 mol / 0.0536 kg = 2.96 m

So the answer is (C) 2.96 m.

What Is the Molality of Ethanol in a Solution Made