Double Replacement Precipitation Reactions.

The first double replacement precipitation reaction in the lab was Cu(NO₃)_2(aq) + 2NaOH_(aq) --> CuOH_2(s) + 2NaNO_3(aq). The driving force behing this reaction is formation of a solid (Copper(II) Hydroxide). These particular products were formed because copper traded places with sodium (Double Replacement).

The second double replacement precipitation reaction in the lab was 3CuCl_2(aq) + 2Na₃PO_4(aq) --> Cu₃(PO₄)_2(s) + 6NaCl_(aq). The driving force in this reaction was formation of a solid (Cupric Phosphate). The particular products formed because copper and sodium traded places making cupric phosphate and sodium chloride.