Given the reactions:
CaCl2, Na2S, Pb(NO3)2, (NH4)3PO4, Na2CO3, K2SO4, MgCl2, AgNO3
Indicate which compounds precipitate (ppt) or remain soluble (no ppt) when mixed.

a) CaCl2: ppt, Na2S: no ppt, Pb(NO3)2: ppt, (NH4)3PO4: no ppt, Na2CO3: ppt, K2SO4: no ppt, MgCl2: no ppt, AgNO3: ppt
b) CaCl2: no ppt, Na2S: ppt, Pb(NO3)2: ppt, (NH4)3PO4: ppt, Na2CO3: ppt, K2SO4: no ppt, MgCl2: ppt, AgNO3: no ppt
c) CaCl2: ppt, Na2S: ppt, Pb(NO3)2: no ppt, (NH4)3PO4: ppt, Na2CO3: ppt, K2SO4: ppt, MgCl2: no ppt, AgNO3: ppt
d) CaCl2: no ppt, Na2S: no ppt, Pb(NO3)2: ppt, (NH4)3PO4: ppt, Na2CO3: no ppt, K2SO4: ppt, MgCl2: ppt, AgNO3: ppt