equilibrium rxns?

Question

Novelty devices for predicting rain contain cobalt(II) chloride and are based on the following equilibrium.
CoCl2(s) + 6 H2O(g)↔ CoCl2·6 H2O(s)
Purple Pink

What color will such an indicator be if rain is imminent?
pink
purple
not enough information to decide

Answer 1

It would go pink, as if rain is imminent, the relative humidity would increase.