Problem: Even though so much energy is required to form a metal cation with a 2+ charge, the alkaline earth metals form halides with the general formula MX2, rather than MX.(c) Use Hess’s law to calculate ΔH° for the conversion of MgCl to MgCl2 and Mg (ΔH° f of MgCl2 = −641.6 kJ/mol).

FREE Expert Solution

conversion of MgCl to MgCl2 and Mg:

 2 MgCl  MgCl2 + Mg


MgCl + ½ Cl2 MgCl2 ΔH° = -641.6 kJ/mol

Mg + ½ Cl2 MgCl ΔH° = -125 kJ/mol


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Problem Details

Even though so much energy is required to form a metal cation with a 2+ charge, the alkaline earth metals form halides with the general formula MX2, rather than MX.

(c) Use Hess’s law to calculate ΔH° for the conversion of MgCl to MgCl2 and Mg (ΔH° of MgCl2 = −641.6 kJ/mol).

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

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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.