What is meant by reversible reaction
Chemical reaction which takes place in both forward and reverse reaction
State the precautions for Part A of this experiment.
i) use test tubes of almost identical diameter ii) The colour intensity of the solution should be compared side by side with control test tube
If Fe(NO3)3 is added to the system " Fe3+ + 2SCN- <--> [Fe(SCN)2]+ ", the result shown as the picture on the right. What disturbance applied to the reaction?
increase in the concentration of Fe3+
Predict the direction of equilibrium if nitrogen is added to the reaction above
Shifts to the right
State Le Chatelier's Principle
If a stress is applied to a system in dynamic equilibrium, the system will adjust to relieve that stress
Predict the direction of equilibrium if temperature of the system is increased to the reaction above
Shifts to the left
Write the Kc expression for the above system
Kc = [HCl]^2 / [SbCl3]
State a precautions for Part B of this experiment.
The solution must turn purple first before the temperature of the solution are changed
The solution turned it's colour as shown in the picture above when heated. Based on the reaction above, state the change in equilibrium position.
Equilibrium position shift to the left
Predict the direction of equilibrium if ammonia gas is removed to the reaction above
Shifts to the right
If NaOH is added to the system " Fe3+ + 2SCN- <--> [Fe(SCN)2]+ ", the result shown as the picture on the right. State the change in equilibrium position.
Equilibrium shift to the left