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Lab Le Chatelirs Principle Essay

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The Effect Of Concentration Changes On Equilibria
Pale
yellow
Pale
yellow
Colourless

Colourless

Blood-Red

Blood-Red

Reversible Reaction: Fe3+(aq) + SCN-(aq) ↔ Fe(SCN)2+(aq)
                                                 
Predictions
  * NaOH -> the equilibrium position will shift to the left because Fe(OH)3 will be produced, making the concentration of Fe3+ lower.
  * AgNO3 -> the equilibrium position will shift to the left because NO3 will react with Fe producing FeNO3 and making the concentration of Fe3+ lower.
  * KSCN -> the equilibrium position will shift to the right because K will dissociate from the SCN making the concentration of SCN- increase.
  * NH4Cl-> the equilibrium position will shift to the left because NH4 will react with SCN- decreasing the quantity of SCN_
  * NaCl-> the equilibrium position will shift to the left because Cl will react with Fe3+ producing FeCl and decreasing the amount of Fe3+ .

Actual Results
Substance | Colour Change | Eq. Position Indication |
NaOH | Turns clearer into a more orange tone with less transparency but not to much turbidity. | Left. |
AgNO3 | The colour of the solution turns lighter, into a yellow tone which seems dense with solid particles. | Left. |
KSCN | The colour of the solution turns darker, into a vivid red colour with less transparency than the control test tube. | Right. |
NH4Cl | The solution turns lighter, into a yellow dense orange with almost null transparency. | Left. |
NaCl | The solution turns a lot lighter and colourless with abundance of some solid particles in the bottom. | Left. |

F
F
E
E
D
D
C
C
B
B
A
A

A: KSCN
B: NaOH
C: AgNO3
D: NH4Cl
E: NaCl
F: Control Solution

Investigation

NaOH

The result of NaOH indicates that the equilibrium position shifted to the left.In molecular terms this is explained by the following facts:
The iron (III) ions (Fe3+) reacted with sodium hydroxide ions (Na+OH-),...

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MLA Citation

"Lab Le Chatelirs Principle". Anti Essays. 15 Dec. 2018

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APA Citation

Lab Le Chatelirs Principle. Anti Essays. Retrieved December 15, 2018, from the World Wide Web: http://parimatch-stavka7.com/free-essays/Lab-Le-Chatelirs-Principle-311154.html


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