posted by Helen on .
For the list of chemicals below, write complete, balanced equations for all possible reactions that would lead to an insoluble salt.
KCl, BaCl2, AgNO3, Pb(No3)2, K2SO4, HNO3
I answered this the other day for you or another student by giving appropriate information. The secret to this question is to know the solubility rules. Here is a simplified set. Memorize them.
There will be a reaction between salts in which a solid (precipitate) will form. We usually abbreviate that as ppt. So here is an example.
2KCl(aq) + Pb(NO3)2(aq) ==> 2PbCl2(s) + 2KCl(aq)
AgCl is insoluble, too, so
KCl(aq) + AgNO3(aq) ==> AgCl(s) + KNO3(aq)
Note that BaSO4 is insoluble; therefore,
BaCl2(aq) + K2SO4(aq) ==> 2KCl(aq) + BaSO4(s)
Just go through the list systematically to get all of the possibilities.