what is a double replacement precipitation reaction and limiting reactants

3 answers

double displacement:

AB+CD>>AD+ CB(s)

example: sulfuric acid+ calcium nitrate.

H2SO4(aq)+Ca(NO3)2 (aq)>> CaSO4(s)+2HNO3

LImiting reactants: any reaction that doesn't have enough of one reactant.
can you explain how pricipitates are formed
a precipate is formed when a NONSOLUBLE compound is formed, it settles out, called a precipate. You have to know the solublity rules to predict compounds that precipate.