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Lab 3 –Precipitation Reactions in Solutions– Lab
Report
C H M 2 0 4 5 L - D r . Y a v u z P e t r o w s k i
The statement is: “I certify that this is my own work and I understand that if I am found to be in violation of
the honor code, I will be subject to the highest penalty”
Name: PRELAB: Background: Please complete the following sections.
Purpose of the experiment
: In your own words, the purpose of the experiment including a brief
description of the lab and the reason for doing the experiment (what we are trying to determine and
how we will go about determining it). Explain the concepts we are investigating; explain why and
how they are useful, how those concepts apply to the experiment; show relevant equations if you
need to.
Using AgNO3, separate even
amounts in the dividers Using the chemicals, put
even mass into every AGNO3
divider
Repat all sample and record
colors. Record the colors and if they made a
liquid. Do the same but with the
CUSO4 and record the data
Flow Chart: Complete experimental procedure for this experiment by using information provided in
the power point and 360 experimental video in a flow diagram format. A flow chart indicates the
procedure of how experiment is performed. The flow chart must be written in the correct flow chart
format (box and arrow). Handwritten flow charts are not accepted. See the example of the flow chart
in canvas module. The purpose of the experiment is to see the reaction of the chemicals to solubility principles. Also
recording the reactions that happen and different data. Waste Collection:
Type out the chemicals used in this experiment, and their hazards if applicable, and any
other safety concerns associated with this experiment. You can search for the Materials Safety Data Sheet
document on the internet to list hazards and safety concerns. You can add an extra row if you need extra
space.
Chemicals
Safety Hazard
CaSO4
Causes irritation with stomach and throat if
eaten
Hazard
CaSO4
Causes
AgNO3
Causes irritation with stomach or nasu
CoCl2
Can cause lung issues
KlO3
Causes irritation with skin
Chemicals
Safety Hazard
NaOH
Causes vomiting and nausea
Na2CrO4
Causes irritation with skin and eyes and if eaten
PRE- DISCUSSION QUESTIONS
Based on the solubility guidelines predict the outcome of the following reactions. If you think a
precipitation reaction will occur,
write balanced reaction equation and write and complete ionic
equation (CIE) and net ionic equation (NIE). A.
Pb(NO
3
)
2 (aq)
+ (NH
4
)
2
S
(aq)
Balanced Equation = Pb(NO3)2 (aq) + (NH4)2S(aq) = PbS (s) + 2NH4(NO3) (aq)
C.I.E. = Pb ^+2 (aq) +2(NO3)^- (aq) +2(NH4)^+ (aq) +S^-2 (aq) = PbS (s) +2(NH4)^+ (aq) + 1(NO3) (aq)
N.I.E. = Pb ^+2 (aq) + S^2- (aq) = PbS (s
B.
FeSO
4 (aq)
+ AgNO
3 (aq)
Balanced Equation = FeSO4 (aq) + AgNO3 (aq) = Fe (NO3)2 (aq) + Ag2SO4 (s)
C.I.E. = Fe ^2+ (aq) + SO4^-2 (aq)+2Ag^+ (aq) + 2NO3 (aq)= Fe ^2+(aq) + 2NO3 (aq) + Ag2SO4 (s) N.I.E.
= SO4^-2 (aq) + 2Ag2SO4 (s)
C.
CuCl
2 (aq)
+ NaOH (aq)
Balanced Equation = CuCl2 (aq) + NaOH (aq). = Cu(OH)2 (s)+2NaCl (aq)
C.I.E. = Cu^+2 (aq) +2Cl ^- (aq) +2Na^+ (aq) +2OH ^- (aq) + Cu(OH)2 (s) +2 CL^- (aq)
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N.I.E. = Cu^+2 (aq) +2OH^- (aq) = Cu (OH)2 (s)
D. KI (aq)
+ Pb(NO
3
)
2 (aq)
Balanced Equation = 2Kl^+ (aq) + Pb(NO3)2 (aq) = 2KNO3 (aq) + Pbl2 (s)Na2CrO4Cause issues if
ingested or inhaled, irrita0on of eyes and skin
C.I.E. = 2k^+ (aq) + Pb ^+2 (aq) +2NO3 (aq) = 2K^+ (aq) +2NO3 (aq) +Pbl2 (s) N.I.E. = 2l^- (aq) + Pb^+2 (aq) = Pbl2 (s
Data table for precipitation reactions: Observation can be written as for no reaction: NR, for
precipitate: PPT, and if only color changes, color of the solution in the table. Please complete both
sections of the observations.
AgNO
3
CuSO
4
CoCl
2
NaOH
Na
2
CrO
4
KIO
3
AgNO
3
1.Ti
NR
2.
Ti
Ppt
brown
3.
Ti
Ppt
Brown
4.
Ti
Ppt
5.
Ti
Ppt
White
CuSO
4
1.Nr
6.
7. 8. ti
Ppt
yellow
9.Ti
NR
CoCl
2
2. Ti
Ppt
white
6.ti NR
10. 11. ti
Ppt
orange
12.ti
NR
NaOH
3. ti
Ppt
white
7.Ti
Ppt
blue 10.Ti
Ppt
Blue
13.Nr
14.ti
nr
Na
2
CrO
4
4. ti
Ppt
brown
8. Ti
Ppt
yellow
11. 13.N3
15.ti
nr
KIO
3
5. 9.
12.
14.
15.Nr
Write the balanced, complete, and net ionic equations
for each precipitation reaction given in the table
shown
. The data table indicates the fifteen performed reactions. Make sure to write a B.E., C.I.E. and
an N.I.E. for those reactions only where you observed a precipitate formation.
Make sure to balance
equations, show charges and states of the reagents in the reaction.
Show the equations below: 1.
AgNO
3
+ CuSO
4
Balanced Eq. 2agNO3 (aq) +CUSO4 (aq)= Ag2SO4+Cu(NO3)2 (aq)
C. I. E. Click or tap here to enter text.
N. I. E. Click or tap here to enter text.
2.
AgNO
3
+ CoCl
2
Balanced Eq. Click or tap here to enter text.
C. I. E.
Click or tap here to enter text.
N. I. E. 2Ag ^+ (aq) +2Cl^- (aq) = 2AgCl^= (s
3.
AgNO
3
+ NaOH
Balanced Eq. AgNO3 (aq) +NaOH (aq) = AgOH (s) +NANO3 (aq
C. I. E. g^+ (aq) +NO3 (aq) +Na^+ (aq) +OH^- (aq) = AgOH (s) +NA^+ (aq) + NO3^- (aq
N. I. E. G^+ (aq) + OH ^- (aq) = AgOH (s)
4.
AgNO
3
+Na
2
CrO
4
Balanced Eq. AgNO3 (aq) + KlO3 (aq) = AgIO3 (s) + KNO3 (aq)
C. I. E.g^+ (aq) +NO3 ^- (aq) + K^+ (aq) +IO3^- (aq) = AgIO3 (s) + K^+ (aq) +NO3 ^- (aq)
N. I. E. ag^+ (aq) +IO3^- (aq) = AgIO3 (s)
5.
AgNO
3
+ KIO
3
Balanced Eq. AgNO3 (aq) + KlO3 (aq) = AgIO3 (s) + KNO3 (aq)
C. I. E. Ag^+ (aq) +NO3 ^- (aq) + K^+ (aq) +IO3^- (aq) = AgIO3 (s) + K^+ (aq) +NO3 ^- (aq)
N. I. E. ag^+ (aq) +IO3^- (aq) = AgIO3 (s)
6.
CuSO
4
+ CoCl
2
Balanced Eq. CuSO4 (aq) +2 COCl2 (g) = CuCl2 (aq) + SO2 (g)+Co2 (g)
C. I. E.
Click or tap here to enter text.
N. I. E. Click or tap here to enter text.
7.
CuSO
4
+ NaOH
Balanced Eq. CuSO4 (aq) + 2NaOH (aq) = Cu (OH)2 (s) +Na2SO4 (aq
C. I. E. Cu^+2 (aq) +SO4 ^-2 (aq) +2Na^+ (aq) +2OH^- (aq)= Cu(OH)2 (s) +2Na ^+ (Aq) + SO4^-2 (aq)
N. I. E. Cu^+2 (aq) +2OH^- = Cu(OH)2 (
8.
CuSO
4
+ Na
2
CrO
4
Balanced Eq. CuSO4 (aq) + Na2CrO4 (aq) = CuCrO4 (s) + Na2SO4 (aq)
C. I. E. Cu^+2 (aq) + SO4 ^-2 (aq) +2Na ^+ (Aq) + CrO4 ^-2 (aq) = 2Na ^+ (aq) + SO4^-2 (aq) +CuCrO4 (s)
N. I. E.Cu^+2 (aq) + CrO4 ^-2 (aq) = CuCrO4 (s)
9.
CuSO
4
+ KIO
3
Balanced Eq. 3CuSO4 (aq) + ^KlO3 (aq) = 3Cu(ClO3)2(s) +3K2SO4 (aq)
C. I. E. Click or tap here to enter text.
N. I. E. Click or tap here to enter text.
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10. CoCl
2
+ NaOH
Balanced Eq.CoCl2 (aq) +2NaOH (aq) = Co(OH)2 (s) +2NaCl (aq)
C. I. E. Co^+2 (aq) +2Cl^- (aq) +2Na^+ (aq) +2OH^= (aq) = Co(OH)2 (s) +2Na^+ (aq) +2Cl(aq)
N. I. E.Co^+2 (aq) +2OH^- (aq) = Co(OH)2 (s)
11. CoCl
2
+ Na
2
CrO
4
Balanced Eq.CoCl2 (aq) + Na2CrO4 (aq) = CoCrO4 (s) + 2Nacl (aq)
C. I. E. Co^+2 (aq) +2Cl^- (aq) + 2Na^+ (aq)+CrO4^-2 (aq) = CoCrO4 (s) +2Na^+ (aq)+ 2Cl^- (aq
N. I. E. Co^+2(aq) +CrO4^-2=CoCrO4 (s)
12. CoCl
2
+ KIO
3
Balanced Eq.CoCl2 (aq) +2KIO3 (aq) = Co(IO3)2 (s) +2KCl (s)
C. I. E. Click or tap here to enter text.
N. I. E. Click or tap here to enter text.
13. NaOH + Na
2
CrO
4
Balanced Eq. 2NaOH (Aq)+ Na2CrO4 (aq)= Na2CrO4(s)+2H20(aq)
C. I. E.
Click or tap here to enter text.
N. I. E. Click or tap here to enter text.
14. NaOH + KIO
3
Balanced Eq. 6NaOH (Aq)+ 6KclO3 (s)= 3KClO4 (s) +2KCl (aq) +3H2O (l
C. I. E.
Click or tap here to enter text.
N. I. E. Click or tap here to enter text.
15. Na
2
CrO
4
+ KIO
3
Balanced Eq. a2CrO4 (aq)+2KclO3 (aq) = 2Na2CrO7 (s)+2KCl (aq)
C. I. E. Click or tap here to enter text.
N. I. E. Click or tap here to enter text.
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