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Elina [12.6K]
3 years ago
5

18.From the following list of aqueous solutions and water, select the one with the highest boiling point.a.1.0 mKNO3b.2.0 mC12H2

2O11(sucrose)c.0.75 mNaCld.pure watere.0.75 mCuCl2
Chemistry
1 answer:
nadezda [96]3 years ago
5 0

Answer:

e. 0.75m CuCl

Explanation:

The boiling point of a solvent increases with the addition of moles of solute. The formula is:

ΔT = i×Kb×m

Where ΔT is boiling point elevation, i is Van't Hoff factor, Kb is ebulloscopic constant and m is molality of solution.

That means <em>the higher i×m, the highest boiling point</em>. Thus:

a. 1.0m KNO₃: i×m = 2ₓ1.0m = <em>2</em>

b. 2.0m C₁₂H₂₂O₁₁: i×m = 1ₓ2.0m = <em>2</em>

c. 0.75m NaCl: i×m = 2ₓ0.75m = <em>1.5</em>

e. 0.75m CuCl: i×m = 3ₓ0.75m = <em>2.25</em>

<em>e. 0.75m CuCl </em>has the highest boiling point

<em></em>

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