5. Which combination will produce a precipitate?

a) NH₄OH(aq) and HCl(aq)

b) AgNO₃(aq) and CaCl₂(aq)

c) NaOH(aq) and HCl(aq)

d) NaCl(aq) and H₂SO₄(aq)

Revelant knowledge

Reaction of precipitation: Precipitation is when two soluble Ionic compounds are mixed , and the insoluble compound forms. Since it is not soluble it is a solid in an fluid environment. It is possible to predict precipitation reactions through switching the ion pair of potential reactants and examining the rules of solubility to determine whether an insoluble compound could develop.