Which one of the following best represents the changes in concentration when the equilibrium mixture is diluted at time $t_2$?
A - VCE - SSCE Chemistry - Question 8 - 2012 - Paper 1
Question 8
Which one of the following best represents the changes in concentration when the equilibrium mixture is diluted at time $t_2$?
A.
concentration
Fe(SCN)^{2+}
B.
con... show full transcript
Worked Solution & Example Answer:Which one of the following best represents the changes in concentration when the equilibrium mixture is diluted at time $t_2$?
A - VCE - SSCE Chemistry - Question 8 - 2012 - Paper 1
Step 1
A. concentration Fe(SCN)^{2+} At time t_2
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Answer
When the equilibrium mixture is diluted at time t2, the concentration of Fe(SCN)^{2+} will initially decrease due to the dilution process.
Step 2
B. concentration Fe^{3+} At time t_2
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Answer
As the equilibrium shifts to compensate for the decrease in the concentration of Fe(SCN)^{2+},theconcentrationofFe3+ will increase, as more Fe^{3+}$ will dissociate to maintain equilibrium.
Step 3
C. concentration SCN^{-} At time t_2
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Answer
Similar to Fe^{3+},theconcentrationofSCN− will also increase as it dissociates from the complex to shift the equilibrium.
Step 4
D. concentration Overall Assessment
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Answer
Thus, the best representation of these changes in concentration when the equilibrium mixture is diluted at time t2 corresponds to option B in the diagram.
