EQUILIBRIUM: To prepare the standard solution, a very large concentration of ferric ion is added to a small initial concentration of thiocyanate ion.
True or False
It would help if we knew what you were doing.
We are determining Chemical Equilibrium: Finding a Constant Kc...
For the following Chemical Reaction:
Fe3+(aq) + SCN-(aq) <> FeSCN2+(aq)
I can't be much help here. You know what you added to what so you know if the ferric ion concentration was large and the thiocyante concentration ion was small. I expect you are adding various amounts of ferric to thiocyante and you will calcuate Kc for each addition.
True...i did the experiment in class
In order to determine whether the statement is true or false, we need to understand the concept of chemical equilibrium and the conditions required for its establishment.
Chemical equilibrium occurs when the rate of the forward reaction is equal to the rate of the reverse reaction, resulting in a constant concentration of reactants and products over time. In this case, we can observe the following chemical reaction:
Fe3+(aq) + SCN-(aq) ⇌ FeSCN2+(aq)
To establish a chemical equilibrium, it is often necessary to manipulate the initial concentrations of reactants. By adding a very large concentration of ferric ion (Fe3+) to a small initial concentration of thiocyanate ion (SCN-), we are essentially shifting the reaction toward the right side and promoting the formation of FeSCN2+.
The reasons behind this approach are as follows:
1. According to Le Chatelier's principle, which states that a system in equilibrium will readjust to counteract any external changes, adding excess reactants can push the equilibrium towards the products.
2. By ensuring a large concentration of Fe3+ and a small concentration of SCN-, we can increase the rate of the forward reaction and promote the formation of FeSCN2+.
Based on the above explanations, the statement is true. By adding a large concentration of ferric ion and a small initial concentration of thiocyanate ion, we can create conditions that favor the formation of FeSCN2+ and establish a chemical equilibrium.