Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Could someone please help I know it agaisnt the guidelines but please!
No plagiarism, please!
LeChatelier’s principle states, “When a change is made to an equilibrium system, the system moves to counteract the imposed change and restore the system to equilibrium.” Use your observations from part 2 to answer the following questions:
- Explain in terms of LeChatelier’s principle the observations made when KSCN was added to the system (Was the forward or reverse reaction favored?
- Explain in terms of LeChatelier’s principle the observations made when NaCl was added to the system (Was the forward or reverse reaction favored? )
- Explain in terms of LeChatelier’s principle the observations made when silver nitrate was added to the system(Was the forward or reverse reaction favored?)
- Explain in terms of LeChatelier’s principle the observations made when Fe(NO3)3 was added to the system(Was the forward or reverse reaction favored? What happened to the reactants or products as a result of adding ?).
- Explain in terms of LeChatelier’s principle and your observations upon the addition of heat to and removal of heat from the system (Was this reaction endothermic or exothermic? Was heat a reactant or product of this reaction?).
Transcribed Image Text:Part II
Next, you will perform some tests on the iron thiocyanate system described in the
equation below and record your observations.
Test
Tube
1
2
3
4
5
6
7
Fe³+ (aq) + SCN (aq)
System
Procedure
Yellow Colorless
No tests (control)
FeSCN²(aq) + heat
Orange-Red
Add 0.1M KSCN drop wise until change is
observed
*increases concentration of SCN in the system
Add 4.0M NaCl drop wise until change is
observed
*decreases concentration of Fe³+ in the system
Add 0.1M Fe(NO3)3 drop wise until change is
observed
*increases concentration of Fe³+ in the system
Add 0.05M AgNO, drop wise until change is
observed
*decreases concentration of SCN' in the
system
Place in hot water bath for 1-2 minutes
*adds heat to the reaction system
Place in ice water bath for 1-2 minutes
*removes heat from the reaction system
Predictions
(what color will
you see)
Right
Orange redder
1. Right
2. yellow
Right
orange
Left
yellow
left
Observations
Left and
yellow
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