Precipitation Reaction Essay

618 Words Sep 9th, 2013 3 Pages
Precipitation Reactions

2-4: Precipitation Reactions

1. Start Virtual ChemLab and select Precipitation Reactions from the list of assignments. The lab will open in the Inorganic laboratory.

2. React each of the cations (across the top) with each of the anions (down the left) according to the data table using the following procedures:

Data Table | AgNO3 (Ag+) | Pb(NO3)2 (Pb2+) | Ca(NO3)2 (Ca2+) | Na2CO3 (CO32-) | A. Pink | F. White | K. White | Na2S (S2-) | B. Black | G. Black | L. NR | NaOH (OH-) | C. Brown | H. NR | M. White | Na2S04 (SO42-) | D. NR | I. White | N. NR | NaCl (Cl-) | E. White | J. White | O. NR |

a. Enter the stockroom by clicking inside the Stockroom window. Once inside the stockroom,
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If no precipitate forms write NR for no reaction.

3. What happens in grid space d? What other reactions give similar results? Is it necessary to write an equation when no reaction occurs? Explain. There is no reaction in grid space E. Grid spaces H, L, N, & O all give similar results to grid space E. all the ions are soluable there is no precipitate..
4. Write balanced equations for all precipitation reactions you observed.


Virtual ChemLab: General Chemistry Laboratories, Student Lab Manual/Workbook, v.2.5, Third Edition, by Brian F. Woodfield, Matthew C. Asplund, and Steven Haderlie.
Published by Prentice Hall. Copyright © 2006 by Pearson Education, Inc.

Reactions and Stoichiometry

AgNO3 + Na2CO3 = NaNO3 + AgCO3
AgNO3 + Na2S = NaNO3 + Ag2S
AgNO3 + NaOH = NaNO3 =AgOH
AgNO3 + NaCl = NaNO3 + AgCl
Pb(NO3)2 + Na2CO3 = NaNO3 + PbCO3
Pb(NO3)2 + Na2S + NaNO3 + PbS
Pb(NO3)2 + Na2SO4 = NaNO3 + PbSO4
Pb(NO3)2 + NaCl = NaNO3 + PbCl2
Ca(NO3)2 + Na2CO3 = NaNO3 + CaCO3
Ca(NO3)2 + NaOH = NaNO3 + Ca(OH)2

5. Write balanced net ionic equations for all precipitation reactions you observed.

Ag+ (aq) + CO32- (aq) = AgCO3 (s) Ag+ (aq) + S2 (aq) = Ag2S (s)
Ag+ (aq) + OH (aq) = AgOH (s)
Ag+ (aq) + Cl- (aq) = AgCl (s)
Pb2+ (aq) + CO32- (aq) = PbCO3 (s) Pb2+ (aq) + S2- (aq) = PbS (s) Pb2+ (aq) + SO42- (aq) = PbSO4 (s)…