The percent by mass of ethanol (MM = 46.07 g/mol) in an aqueous solution is 16.9%. What is the molality of the ethanol solution?
Answers
Answer:
we have a 10% solution of ethanol with the density of 0.984 grams per mil leader, you want to find the morality, the polarity and the moles of solution. To find the morality I first had to find similarity. Using this equation I get will first have to change the density from Grams Pamela Leader to leader grams per liter. And I put that into the equation times me molecular weight, which is 0.22 most for Graham, which gives us que 1.65 moulder concentration. Now it's a 10% solution, so we have to times that by 10% to give us 2.17 Moeller concentration, which we were used to find her mobility right there times it by grams per mil leader 1000 milliliters cheerleader to give us mammal ality of 2.21 Now we need to find our Mel's of solution just given by this equation here, no 0.125 moles equals X. Just what we're trying to find. We want to find the amount needed, uh, of Moeller concentration of 0.1 to 5. What would be our final concentration, and we put everything into the equation. You're saying there the volume would be 5.76%. plss mark me as the brainliest.
Answer:
The molality of the ethanol solution is 0.00442 mol/kg.
Explanation:
To calculate the molality of an ethanol solution, we need to know the moles of solute (ethanol) per kilogram of solvent (water).
First, we can calculate the mass of ethanol in the solution. We know that the percent by mass of ethanol is 16.9%, which means that for every 100 g of the solution, 16.9 g is ethanol. So, for a given mass of solution (let's say 1 kg), the mass of ethanol would be:
mass of ethanol = 0.169 kg (since 16.9% = 0.169)
Next, we can calculate the number of moles of ethanol in the solution. We use the molecular mass of ethanol (46.07 g/mol) to convert the mass of ethanol to moles:
moles of ethanol = mass of ethanol / molecular mass
= 0.169 kg / 46.07 g/mol
= 0.00367 mol
Finally, we can calculate the molality of the solution, which is the number of moles of ethanol per kilogram of water:
molality = moles of ethanol / mass of water (in kg)
= 0.00367 mol / 0.831 kg (since 1 kg of solution - 0.169 kg of ethanol = 0.831 kg of water)
= 0.00442 mol/kg
Therefore, the molality of the ethanol solution is 0.00442 mol/kg.
Learn more about Molality :
https://brainly.in/question/13515991
#SPJ2