Which aqueous solution has a freezing point closer to its predicted value, 0.01 m NaBr or 0.01 m MgCl₂? Explain.

Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter14: Mixtures And Solutions
Section14.4: Colligative Properties Of Solutions
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Which aqueous solution has a freezing point closer to its predicted value, 0.01 m NaBr or 0.01 m MgCl₂? Explain.

Expert Solution
Step 1

The freezing point depression (Tf) of a solution can be expressed as:

Tf=i·Kf·m

where, i is the Van't Hoff factor, Kf is the freezing point constant of solvent, m is the molality.

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