7.2 Evidence of a Chemical Reaction

Writing Equations for Precipitation Reactions
4. If all of the potentially insoluble products are
soluble, there will be no precipitate. Write NO
REACTION next to the arrow.
5. One of the potentially insoluble products is
insoluble, so write its formula as the product
of the reaction, using (s) to indicate solid.
Write the soluble product with (aq) to indicate
aqueous.
• Na 2CO 3(aq) + CuCl 2(aq) CuCO 3(s) +
NaCl(aq)