Please rank order the following compounds from lowest to highest according to la

Question

Please rank order the following compounds from lowest to highest according to lattice energy SrCl_2, CaCl_2, MgCl_2 and BaCl_2. Lowest Lattice Energy Highest Lattice Energy Which compound is most ionic: PCl_3, NaCl, MgCl_2, or AlCl_3? Using the following data, calculate the lattice energy of KF Delta H K(g) = 90 kJ/mol delta H F(g) = 80 kJ/mol IE, (K) = 419 kJ/mol Delta H, KF(s) = -547 kJ/mol EA1F = 328 kj/mol Please draw the Lewis Structure for PBr3. Be sure to clearly indicate each valence electron. Unclear Lewis structures will not be given full credit and may be given zero credit.

Explanation / Answer

Lattice energy of compounds are as follows

Name of the compound Lattice energy ( Kj/mol)

SrCl2 2127

CaCl2 2195.2

MgCl2 2326

BaCl2 2056.2

Hence the order from Lowest lattice energy to Highest lattice energy would be

BaCl2, SrCl2, CaCl2  , MgCl2

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