Question

Experiment 5: Will a Precipitate Form when Two Solutions are Combined? 1. Write the full balanced, full ionic, and net ionic equations for the following precipitation reactions, identifying the spectator ions in each case. Be sure to include the state of matter for each species. (i) AlBr3(aq) + NaOH(aq) (ii) Pb(NO3)2 (aq) + KCl (aq) 2. The second set of six solutions will be the following: CoSO4(aq), CoClaraq), BaCl(aq), NaOH 24), Na2CO3(aq), KIOX) Name each compound in the order listed.

Answer 1

1

(I)

3 NaOH_(aq) + AlBr_3(aq) -------------> 3 NaBr(aq) + Al(OH)₃(s)

Net ionic equation can be written as

Al³⁺_(aq) + 3Br^-_(aq) -------------> Al(OH)₃(s)

spectator ions are those which are present in both side as it is

Na+(aq) , Br-(aq)

(ii)

Pb(NO₃)_2(aq) + 2KCl_(aq) = 2KNO_3(aq) + PbCl_2(s)

Net ionic equation

Pb²⁺_(aq) + 2Cl^-_(aq) -------------> PbCl_2(s)

spectator ions are

NO₃^- and K⁺

2.

Cobalt sulphate , cobalt chloride , barium chloride, sodium hydroxide, sodium carbonate , potassium iodate