Which of the following is a true statement about chemical equilibria in general
A.there is only one set of equilibrium concentrations that equal the Kc value
B.eqauilibrium is the result of cessation of all chemical change
C.at equilibrium the rate of the forward reaction is equal to the rate of the reverse reaction
D.at equilibrium the total concentration of products equals the total concentration of reactants. that is [products]=[reactants]
I am going with C. as correct
can you confirm please
thanks
C is correct.
thankyou so much
Yes, you are correct. Statement C is a true statement about chemical equilibria in general. At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction. This means that the concentrations of the reactants and products remain constant over time.
To verify if statement C is correct or not, let's review the definition of chemical equilibrium and the conditions associated with it.
Chemical equilibrium occurs when the rates of the forward and reverse reactions are equal and the concentrations of reactants and products remain constant over time. At equilibrium, both the forward and reverse reactions are still occurring, but they are happening at the same rate.
Statement C correctly states that at equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction. This is an essential condition for a system to be in a state of equilibrium.
Therefore, the statement C is indeed a true statement about chemical equilibria in general.
In contrast, let's analyze the other options to demonstrate why they are not true:
A. The equilibrium concentrations are not fixed but can vary depending on the initial concentrations of reactants and products. Therefore, this statement is not correct.
B. Equilibrium does not imply the cessation of all chemical change. Instead, it indicates that the rates of the forward and reverse reactions are balanced. Hence, this statement is incorrect.
D. At equilibrium, the concentrations of products and reactants can be different. However, the ratio of their concentrations, as given by the equilibrium constant Kc, remains constant. Consequently, this statement is not accurate.
In summary, statement C is the only correct one among the options provided.