Salts of alkaline earth metals are less soluble than salts of alkali metals because? . a. a higher anion charge concentrated on the smaller anions makes it hard to pull apart ionic lattices. b. a higher anion charge concentrated on the smaller anions makes it easier to pull apart ionic lattices. c. a higher cation charge concentrated on the smaller cations makes it hard to pull apart ionic lattices. d. a higher cation charge concentrated on the smaller cations makes it easier to pull apart ionic lattices