Can you help me out please? Thanks!
When a 2.5 mol of sugar (C12H22O11) are added to a certain amount of water the boiling point is raised by 1 Celsius degree. If 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? Show all calculations leading to your answer OR use 3 – 4 sentences to explain your answer.
When a 2.5 mol of sugar (C12H22O11) are added to a certain amount of water the boiling point is raised by 1 Celsius degree. If 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? Show all calculations leading to your answer OR use 3 – 4 sentences to explain your answer.
1 Answer
The boiling point will be raised by 4 °C.
Explanation:
The formula for boiling point elevation
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where
If we have two different solutions of the same molality in the same solvent, we can write
or
Let
Sucrose is a covalent compound. It does not dissociate in solution, so
Aluminium nitrate is a soluble ionic compound. It dissociates in solution according to the equation
Thus, 1 mol of solute forms 4 mol of particles, and
∴