Consider two solutions: one formed by adding 10 g of glucose, C6H12O6, to 1 L of water and another formed by adding 10 g of sucrose, C12H22O11, to 1 L of water. Are the vapor pressures the same?
No, they are not the same.
As you are aware, vapor pressure lowering is a colligative property of solutions, meaning that the amount of particles in your solution determines its behavior, not the kind of particles.
This equation now describes the vapor pressure of a solution containing a non-volatile solute.
The amount of solute that each of these two solutions contains will now be the only distinction between them.
With glucose, you would
For sugar, you would need
Why, then, does the quantity of solute matter in moles?
The number of moles of water divided by the total number of moles in the solution is the mole fraction of water.
The mole fraction of water in this instance will be
As you can see, the sucrose solution will have a larger mole fraction of water, meaning that the solution's vapor pressure will be closer to that of pure water.
Thus, it can be concluded that the sucrose solution will have a higher vapor pressure than the glucose solution.
By signing up, you agree to our Terms of Service and Privacy Policy
The vapor pressures of the two solutions would not be the same. Glucose and sucrose are both non-volatile solutes, meaning they do not evaporate easily. However, they do affect the vapor pressure of the solution differently due to their different molecular weights and structures. Sucrose has a larger molecular weight than glucose, and it also forms stronger intermolecular forces, resulting in a lower vapor pressure compared to the glucose solution.
By signing up, you agree to our Terms of Service and Privacy Policy
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
- A flask contains 85.5 g #C_12H_22O_11# (sucrose) in 1.00 liters of solution. What is the molarity?
- The solubility of an ionic compound, MX (molar mass of 346g) is #4.63*10^-3 g/L#. What is Ksp for the compound?
- What volume (in mL) of #".220 M"# ethanol solution contains #2.90 xx 10^-3# #"mol"# ethanol?
- Would phenol be soluble in cyclohexane?
- How many milliliters of .45 M #HCl# will neutralize 25.0 mL of 1.00 M #KOH#?
- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7