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Calcium carbonate occurs in two common crystalline forms, calcite (Ksp = 3.4 × 10-9) and aragonite (Thermodynamics Chemistry Question

Question

Calcium carbonate occurs in two common crystalline forms, calcite (Ksp = 3.4 × 10-9) and aragonite (Ksp = 6.0 × 10-9). Which of these is most thermodynamically stable?

A.

Calcite

✓ Correct
B.

Aragonite

C.

The two forms are equally stable.

D.

The relative stability cannot be determined from the Ksp values.

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