Which list of solutions is arranged in order from highest boiling point to lowest boiling point? a 2.0 bacl2 b 2.0 nano3 c 1.0 c6h12o6 d 1.0 k2so3

Explanation:

The boiling point of a pure solven increases when a solute is added and a solution is formed.

The increase of the boiling point of a solvent, when a non-volatile solute is added, is a colligative property, meaning that it depends of the number particles of solute dissolved.

The equation that rules the increase of the boiling point is:

Where:

Then, since Kb is constant (because it is the same solvent for all the solutions), you must look at the product m × i.

For ionic solutes you assume 100% ionization, which drives to:

Solution                  Ionization           i        m         m × i

A) 2.0 BaCl₂             Ba⁺² + 2Cl⁻       3      2.0        6.0     ↔ highest

B) 2.0 NaNO₃          Na⁺ + NO₃⁻       2      2.0        4.0      ↔ second

C) 1.0 C₆H₁₂O₆          none                1       1.0         1.0      ↔ lowest (fourth)

D) 1.0 K₂SO₃             2K⁺ + SO₃²⁻      3      1.0         3.0     ↔ third

Then, 6.0 > 4.0 > 3.0 > 1.0 and the final list of the solutions arranged in order from highest boiling point to lowest boiling point is:

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