Identify the precipitation reactions. Ba(NO 3 ) 2 +CuSO 4 --->BaSO 4 +Cu(NO 3 )
ID: 76301 • Letter: I
Question
Identify the precipitation reactions.Ba(NO3)2 +CuSO4--->BaSO4 +Cu(NO3)2
HCl + KOH--->KCl + H2O
C+O2--->CO2
H2O2 +NaClO--->NaCl+H2O+O2
2NaI+HgCl2---->HgI2+2NaCl
HBr + KOH---> KBr + H2O
2KI + Pb(NO3)2---->PbI2+2KNO3
Instead of just saying which ones are precipitation reactions andwhich ones aren't, could you please explain how you got your answeras well? Thank you so much!
Explanation / Answer
Ba(NO3)2 +CuSO4--->BaSO4 +Cu(NO3)2--->PRECIPITATION, BaSO4 isinsoluble HCl + KOH--->KCl + H2O--->NOTPRECIPITATION, all products are soluble C+O2--->CO2--->NOTPRECIPITATION, product is not a SOLID H2O2 +NaClO--->NaCl+H2O+O2--->NOT PRECIPITATION, no solid product 2NaI+HgCl2---->HgI2+2NaCl--->PRECIPITATION, HgI2 is insoluble HBr + KOH---> KBr + H2O--->NOTPRECIPITATION, all products are soluble 2KI + Pb(NO3)2---->PbI2+2KNO3--->PRECIPITATION, PbI2 is insoluble precipitation reactions occur when one of the products of thereaction is INSOLUBLE in water, that is a SOLID here are simple rules on the solubility of a compound in water 1) ALL compounds containing the Group I ions, NH+ ,NO3-, ClO3-,C2H3O2- ions areSOLUBLE 2) ALL compounds containing Pb2+,Hg2+,Ag+ , CO32-ions are INSOLUBLEEXCEPT for those mentioned in RULE 1 3) ALL compounds containing Ca2+, Sr2+,Ba2+, SO42- ions are SOLUBLEEXCEPT for those mentioned in RULE 2 4) When ions in Rule 3 are combined with each other, the resultingproduct is INSOLUBLE (I've re-organized these rules from memory, so please try to checkthe web or the books if I did it right) :-|