Which of the following describes a reaction that reaches equilibrium?
A. The products and reactants reach a final, unchanging level.
O
B. The concentrations of products and reactants begin to go up and
down.
O
C. The products reach a maximum level and then begin to drop off.
W
O
D. The products reach a final level, and the reactants are gone.
SUBMIT

Option A. The products and reactants reach a final, unchanging level.

Explanation:

When a chemical system reaches an equilibrium state, it means it has gotten to a state where there is no observable change in the properties of the system with respect to time. At this state the products and the reactants are occurring at same rate

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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