You're supposed to use your knowledge of chemistry to answer these.
The first one, AgNO3 and Zn(NO3)2.
Add NaCl. The AgNO3 reacts with NaCl to produce a white insoluble precipitate of AgCl. Zn(NO3)2 and NaCl does nothing. So the secret is to know the solubility tables. Where a ppt will not form, the usual test is something that produces a colored complex ion, or something similar.
For the solids.
Add H2O. AgCl is insoluble. ZnCl2 dissolves easily.
Now you try the others.
By means of what single reagent could you distinguish between the following? (Tell what happens to each substance.)
Solutions:
AgNO3 and Zn(NO3)2
H2SO4 and HNO3
Ag(NH3)2Cl and AgNO3
Solids:
AgCl and ZnCl2
AgCl and Hg2Cl2
PbCrO4 and K2CrO4
1 answer