what is a good source to understand common ion effect?

Answer 1

go 2 www.everyscience.com

Answer 2

I generally say google it, but in general an ion is an atom with a different number of electrons than it would have in its 'original' state. I think the ion effect you're talking about is like the ion bond of Sodium and Chlorine. (Assuming you understand about electron shells, there are a max of 2 in the first shell then 8 in the second then 8 then 18 and so on). Sodium has 1 electron in its outer shell and as such wishes to dispose of it to be left with the full outer shell below it making it 'happy'. Chlorine on the other hand has 7 electrons and wishes to gain 1 more (as this is easier than losing seven) . So sodium and chlorine kind of agree to have sodium donate its electron to chlorine, making them both happy. Now sodium has a +1 (as it has 1 more positively charged proton then the negative charged electrons) charge and Chlorine has a -1 charge. In this situation opposites attract (this may be different in the really more complicated stuff) and the two elements bond to create Na+Cl-. This type of bond is an ionic bond. If you used silicon instead of chlorine you would need 2 sodium as silicon is missing two electrons form its outershell though, just a note to remind you charges or what is needed to be taken or give MUST be remembered. I hope that helps though someone has probably said this by now as I am a slow typer