Chemistry, 24.03.2020 17:06 Maria3737

List the salts in order from weakest to strongest lattice energy (most positive to most negative). magnesium chloride, barium chloride, calcium chloride, strontium chloride Group of answer choices magnesium chloride < calcium chloride < strontium chloride < barium chloride calcium chloride < barium chloride < magnesium chloride < strontium chloride magnesium chloride < barium chloride < calcium chloride < strontium chloride strontium chloride < calcium chloride < barium chloride < magnesium chloride barium chloride < strontium chloride < magnesium chloride < calcium chloride barium chloride < strontium chloride < calcium chloride < magnesium chloride calcium chloride < magnesium chloride < strontium chloride < barium chloride

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Answer from: jake56555

The correct order from weakest to strongest lattice energy is;

Option B; barium chloride < strontium chloride < calcium chloride < magnesium chloride

The lattice energy is defined as the energy required to dissociate one mole of an ionic compound to its constituent gaseous ions.

Now, Lattice energy is inversely proportional to the size of the ions. This implies that as the size of the ions increases, then the lattice energy will decrease. The size of the ions is also called the atomic radii.

Thus, as atomic radii increases, lattice energy will decrease.

Now, the compounds we are dealing with are;

Barium chloride

Strontium Chloride

Calcium Chloride

Magnesium Chloride

All the metals that form the chlorides above are all in group 2 of the periodic table and in chemistry, atomic radius decreases across a period and increases down a group.

Thus, the order of increasing atomic radii down the group 2 are;

Magnesium, Calcium, Strontium, Barium.

Since barium is farthest down the group, it will have highest atomic radius and thus weakest lattice energy while magnesium will have the smallest atomic radius and strongest lattice energy.

In conclusion, the order from weakest to strongest lattice energy is;

barium chloride < strontium chloride < calcium chloride < magnesium chloride

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List the salts in order from weakest to strongest lattice energy (most positive to most negative). m...

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