Bella C.

asked • 05/18/22

Chem help please

A metal, M , of atomic mass 56 amu reacts with chlorine to form a salt that can be represented as MClx. A boiling point elevation experiment is performed to determine the subscript 𝑥 , and therefore, the formula of the salt. A 31.4 g sample of the salt is dissolved in 100.0 g of water and the boiling point of the solution is found to be 376.96 K. Find the formula of the salt. Assume complete dissociation of the salt in solution.

J.R. S.

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Curious to see answers to this since we don't know x and we don't know molar mass so can't find molality. Without molality we can't find the van't Hoff factor (i) and hence x. If M has atomic mass of 56 amu, it must be iron (Fe) and MClx would be either FeCl2 or FeCl3. I hope someone chimes in with a reasonable answer b/c I find this question intriguing.
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05/18/22

1 Expert Answer

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Donovan E. answered • 05/18/22

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4th Year Med Student - Math/Science/ACT/SAT Tutor 9th - College
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I had some issues showing my work in full but I made a point to highlight the logic behind the calculation. Happy to go over this problem and others.

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