In the synthesis of ester, how does conc. aqueos calcium chloride

[cyt91]

In the synthesis of ester, how does conc. aqueos calcium chloride remove excess ethanol? I tried google, and found out that a complex is formed. How is this possible? If then what exactly is the complex formed? Thanks.

 

[chemisttree]

Obviously some kind of association between the hydroxyl and the calcium ion. I've seen this kind of association with calcium hydroxide as well. Calcium hydroxide is not very soluble in water but sugar greatly enhances its solubility.