Asked by Anonymous

How can you distinguish chemically between the following pairs of substances in one or two steps.
a)HCl and H2SO4
b) KNO3 and K3PO4
Answered by DrBob222
a)
Add AgNO3, HCl forms white ppt of AgCl, soluble in NH3.
Add BaCl2, H2SO4 forms white ppt of BaSO4, not soluble in HNO3.

b)
Add AgNO3, K3PO4 forms yellow ppt of Ag3PO4. Soluble in HNO3.