Which of the following statements is always true? a. The rate law can be determined from the stoichiometric equation. b. The rat
1 answer:
Answer:
d. The rate constant is independent of the concentrations of the reacting species.
Explanation:
According top law of mass action,
The rate of a reaction is directly proportional to product of active concentration of the reactant each raised to the power of their orders (experimentally determined numbers).
Where, k is rate constant
m and n are order
Hence, a is incorrect.
If order is equal to zero, it means that the rate does not depend on the concentration of that reactant which means that c is incorrect.
Rate constant in the expression of the rate law depends only on temperature and thus, d is correct.
Statement e is not always true.
Catalyst is the specie that alters the rate of a reaction which means that b is incorrect.
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The given question is incomplete. The complete question is :
Carbon tetrachloride can be produced by the following reaction:
Suppose 1.20 mol of and 3.60 mol of
were placed in a 1.00-L flask at an unknown temperature. After equilibrium has been achieved, the mixture contains 0.72 mol of
. Calculate equilibrium constant at the unknown temperature.
Answer: The equilibrium constant at unknown temperature is 0.36
Explanation:
Moles of = 1.20 mole
Moles of = 3.60 mole
Volume of solution = 1.00 L
Initial concentration of =
Initial concentration of =
The given balanced equilibrium reaction is,
Initial conc. 1.20 M 3.60 M 0 0
At eqm. conc. (1.20-x) M (3.60-3x) M (x) M (x) M
The expression for equilibrium constant for this reaction will be,
Now put all the given values in this expression, we get :
Given :Equilibrium concentration of , x =
Thus equilibrium constant at unknown temperature is 0.36