solubility down group 2

Question 1

what does solubility of group 2 compounds depend on?

Answer 1

whether the negative charge of the ion contained in the compound is single or double

Question 2

what happens if a group 2 compound contains double negative charged ions?

Answer 2

soloubiluity decreases

Question 3

what happens if the group 2 compoound has a single charged negative ion?

Answer 3

then soloubility of group 2 compounds increase going down the group