Why is AgCl insoluble in water

it is ionic compound

solvent with permanent dipole (polar solvent) can dissolve some ionic compound although the ionic bond is strong.An exothermic
because polar solvent can break the ionic bond to form ion-dipole attraction .
the attraction will make the hydrated ions that stable in polar solvent

new ion-dipole attraction will form when these attraction are stronger or similar to that of the ionic bond . ionic compound is stable.

exothermic when solve because energy release.
formation of ion-dipole attraction usually give out more energy than the energy require to break the ionic bond

圖片參考：http://nobel.scas.bcit.ca/chem3303/units/solution/images/ioniclattice_water.gif



2011-06-07 15:19:16 補充：
sorry 我可能真係冇睇清楚

Then why is NaCl soluble in water?
呢條問題個答案就係上面

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Why is AgCl insoluble in water?

Silver chloride, AgCl, is insoluble since all chlorides are soluble EXCEPT those of silver, lead (II), mercury (I), copper (II) and thallium.

至於why 就答唔到=[

睇下有冇其他高手高抬貴手

Wai Ho, 雖然你答題可能很用心, 但明顯沒有仔細閱讀題目, 以致文不對題.

2011-06-05 19:09:34 補充：
現在不是問"為甚麼離子化合物會溶水",
而是問"為甚麼氯化銀不溶水".
你說氯化銀是離子化合物, 但又不溶水, 恐怕是自相矛盾了.

Then why is AgCl not soluble in water?
How does the attractions affect the solubility??????????