Problem: Based on the lattice energy trends, put the following ionic compounds in order from lowest melting point to highest melting point.CaO     MgO     SrSa. SrS < CaO < MgOb. CaO < SrS < MgOc. MgO < CaO < SrSd. SrS < MgO < CaOe. CaO < MgO < SrS

FREE Expert Solution

Determine the ranking for increasing melting point by calculating the lattice energy 

Recall that the melting point of an ionic compound is related to its lattice energyThe lattice energy can be estimated using:


lattice energy=cation charge×anion chargecation period # + anion period #



This means the compound with the highest lattice energy has the highest melting point.

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Problem Details

Based on the lattice energy trends, put the following ionic compounds in order from lowest melting point to highest melting point.

CaO     MgO     SrS

a. SrS < CaO < MgO

b. CaO < SrS < MgO

c. MgO < CaO < SrS

d. SrS < MgO < CaO

e. CaO < MgO < SrS