The Student Room Group

Reply 1

ogechi
why is calcium hydroxide sparingly soluble in water?


isn't it because there is a decrease in entropy when it dissolves in water, so it doesn't tend to

Reply 2

can u elaborate on that 4 me pls??

kohlstream
isn't it because there is a decrease in entropy when it dissolves in water, so it doesn't tend to

Reply 3

ogechi
can u elaborate on that 4 me pls??


ok, well entropy is a measure of disorder. The more disordered a system, the more stable it is. When calcium hydroxide dissolves, this involves a decrease in entropy; the particles become more ordered than they were in the solid state, and so this process is not favourable in terms of stability (I'm not sure stability is the right word.. I can't explain what I mean)