16 Questions
What is the defining characteristic of a reversible reaction?
It reaches an equilibrium state
What is the necessary condition for equilibrium in a reversible reaction?
Equal concentrations of reactants and products
In a complete reaction, what happens to all the reactants?
They are converted into products
What is the Law of Mass Action related to?
Concentration of reactants and products
What happens to most chemical reactions in terms of completion?
They never go to completion
What is responsible for the existence of life on Earth?
The delicate equilibrium phenomenon in the atmosphere
What is the macroscopic characteristic of the reverse reaction in a reversible reaction?
Equal rate with the forward reaction
What do reversible reactions in chemistry involve?
Products recombining to form reactants
What is the main characteristic of irreversible reactions?
They never go to completion
What is a common example of a reversible reaction in everyday life?
Formation of water from hydrogen and oxygen
What happens when hydrogen iodide is heated in a closed flask?
Formation of purple iodine vapors
What does the purple color fading in the reaction between hydrogen and iodine indicate?
The forward reaction
What do aquatic plants and animals indirectly depend on for their lives?
The concentration of dissolved oxygen in water
What is the main role of equilibrium phenomenon in the atmosphere for life on Earth?
Supporting the existence of life on Earth
What does the delicate equilibrium phenomenon support in environmental systems?
The existence and balance of environmental systems
What do irreversible reactions involve?
Formation of new substances only
Test your understanding of chemical equilibrium, reversible reactions, and the equilibrium constant with this quiz. Explore the macroscopic characteristics of forward and reverse reactions, the Law of Mass Action, and the derivation of the equilibrium constant and its units.
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