Q2)If given the mole fraction of water in an aqueous sucrose (C12H22011) solutio

Question

Q2)If given the mole fraction of water in an aqueous sucrose (C12H22011) solution and asked to calculate the molality of the solution at the same temperature, what additional information would you need to be given in order to complete the problem?
-the temperature of the solutiorn.
-nothing. I have everything I need.
-the density of the solution at the same temperature.
-the number of moles of sucrose. Q2)If given the mole fraction of water in an aqueous sucrose (C12H22011) solution and asked to calculate the molality of the solution at the same temperature, what additional information would you need to be given in order to complete the problem?
-the temperature of the solutiorn.
-nothing. I have everything I need.
-the density of the solution at the same temperature.
-the number of moles of sucrose. Q2)If given the mole fraction of water in an aqueous sucrose (C12H22011) solution and asked to calculate the molality of the solution at the same temperature, what additional information would you need to be given in order to complete the problem?
-the temperature of the solutiorn.
-nothing. I have everything I need.
-the density of the solution at the same temperature.
-the number of moles of sucrose.

Explanation / Answer

ANS: Molality is defined as number of moles of a solute dissolved in 1 Kg of solvent.

Now from the data that we have that is mole fraction of water we can not calculate anything.We can only calculate mole fraction of sucrose by substracting the mole fraction of water from 1.

But that still wont help us in calculating molality because we require two properties for that, one is mole of sucrose and second is weight of water. Since we don't have weight or moles of water as an option so what we will require is Moles of Sucrose.

Then we can calculate moles of water present using mole fraction. And from that we can determine weight of water. Which when put in the formula will give us molality.

If we were to calculate molarity of the solution we would ask for density of the solution.

Hope it helped you. Leave a like if it does.

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