Problem: Arrange these compounds in order of increasing magnitude of lattice energy: KCl, SrO, RbBr, CaO.

🤓 Based on our data, we think this question is relevant for Professor Saitta's class at UCF.

FREE Expert Solution

The lattice energy can be estimated using:


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



For KCl: 

K+ is from Period 4 with a charge of +1 while Cl is from Period 3 with a charge of –1.


The lattice energy of KCl is:


lattice energy=+1×-14+3 = 0.143


For RbBr: 

Rb+ is from Period 5 with a charge of +1 while Br is from Period 4 with a charge of –1.


The lattice energy of RbBr is:

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Problem Details

Arrange these compounds in order of increasing magnitude of lattice energy: KCl, SrO, RbBr, CaO.


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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 Lattice Energy concept. You can view video lessons to learn Lattice Energy. Or if you need more Lattice Energy practice, you can also practice Lattice Energy practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Saitta's class at UCF.