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Answer to Question #85464 in General Chemistry for Luke

Question #85464
The melting point of a pure solvent is -116.3 C. If 352 g of an ionic solid is added to 567.7g of the solvent, the new melting point is -121.6 C. What is the molar mass of the ionic solute?
1
Expert's answer
2019-02-25T08:21:04-0500

delta T = i•Kf•molality

Molality = moles / kg solvent

You have molality and kg solvent, solve for moles.

Moles = grams / molar mass. You have moles and grams, solve for molar mass.


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