Problem: A metal, M, of atomic weight 96 reacts with fluorine to form a salt that can be represented as MFx. In order to determine x and therefore the formula of the salt, a boiling point elevation experiment is performed. A 9.18-g sample of the salt is dissolved in 100.0 g of water and the boiling point of the solution is found to be 374.38 K.Find the formula of the salt. Assume complete dissociation of the salt in solution.

FREE Expert Solution

We are asked to find the formula of the salt, MFx. Assume complete dissociation of the salt in solution.

We shall follow these steps in solving the problem.

Step 1: Determine the molality of the salt solution.

Step 2: Get the number of moles of solute given the mass of solvent.

Step 3: Get the apparent molar mass of the salt.

Step 4: Determine the formula of the salt.


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Problem Details

A metal, M, of atomic weight 96 reacts with fluorine to form a salt that can be represented as MFx. In order to determine x and therefore the formula of the salt, a boiling point elevation experiment is performed. A 9.18-g sample of the salt is dissolved in 100.0 g of water and the boiling point of the solution is found to be 374.38 K.

Find the formula of the salt. Assume complete dissociation of the salt in solution.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the The Colligative Properties concept. You can view video lessons to learn The Colligative Properties. Or if you need more The Colligative Properties practice, you can also practice The Colligative Properties practice problems.

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Based on our data, we think this problem is relevant for Professor Halpin & Geggier's class at NYU.