Which of the following solutions will have a higher boiling point?
A. 1m C6H12O6
B. 1m NaCl
C. 1m MgCl2
D. 1m AlCl3
And pls explain why it is. Thank you so much!!
wats Kf and kb
AlCl3 because it has the most particles upon dissociating.
delta T = i*Kf*m
You want to know which solution produces the higher delta T. m is the same, Kf is the same, the only difference is i. i is the van't Hoff factor which is the number of particles.
A does not ionize (at least I assume it doesn't). B ionizes into two particles, C into 3 particles and D into four particles. So stick 1, 2, 3, 4 into the equation. Which gives the higher number for delta T?
D.AlCl3 bcos colligative properties are directly proportional to the no. of solute particles. AlCl3 has 4 particles on dissociating.
To determine which of the given solutions will have a higher boiling point, we need to consider the concept of boiling point elevation caused by the presence of solutes in a solution.
Boiling point elevation occurs because the solute particles disrupt the intermolecular forces between the solvent molecules. As a result, more energy (in the form of heat) is required to break these intermolecular forces and bring the solution to its boiling point.
The extent of the boiling point elevation depends on the concentration of the solute in the solution. The greater the concentration, the greater the boiling point elevation.
Now let's consider the given solutions:
A. 1m C6H12O6 (glucose): Glucose is a molecular compound that does not dissociate in water. Therefore, it only contributes one particle per molecule to the solution. So, at a concentration of 1m (1 mole per liter), the number of particles would still be relatively low compared to the other options.
B. 1m NaCl: Sodium chloride (NaCl) is an ionic compound that dissociates into Na+ and Cl- ions when dissolved in water. This dissociation increases the number of particles in the solution compared to its concentration. At a concentration of 1m, we would have 1 mole of Na+ ions and 1 mole of Cl- ions per liter of solution. This increase in particle concentration leads to a greater boiling point elevation compared to glucose.
C. 1m MgCl2: Magnesium chloride (MgCl2) is also an ionic compound that dissociates into Mg2+ and 2 Cl- ions when dissolved in water. At a concentration of 1m, we would have 1 mole of Mg2+ ions and 2 moles of Cl- ions per liter of solution. The presence of three particles in solution leads to a greater boiling point elevation compared to both glucose and sodium chloride.
D. 1m AlCl3: Aluminum chloride (AlCl3) is an ionic compound that dissociates into Al3+ and 3 Cl- ions when dissolved in water. At a concentration of 1m, we would have 1 mole of Al3+ ions and 3 moles of Cl- ions per liter of solution. The presence of four particles in solution leads to the greatest boiling point elevation compared to the other options.
To conclude, among the given options, the solution with the highest boiling point elevation (and therefore the highest boiling point) would be D: 1m AlCl3, due to the presence of four particles in solution.