Chemistry Flashcards
What are species that are stable in water characterized by?
They neither oxidize nor reduce water nor undergo disproportionation in water.
What happens to compounds that are unstable in water?
They undergo oxidation or reduction reactions or disproportionation.
What does H2O act as when compounds evolve H2 by reacting with it?
An oxidizing agent.
What does H2O act as when compounds evolve O2 by reacting with it?
A reducing agent.
Fill in the blank: Disproportionation reactions involve an element whose oxidation number ______ simultaneously.
[increases and decreases]
What is the definition of a disproportionation reaction?
A redox reaction where an element’s oxidation number increases and decreases simultaneously, forming products in different oxidation states.
What is the outcome when H2O acts as an oxidant?
It is reduced to H2.
What is the outcome when H2O acts as a reductant?
It is oxidized to O2.
In the reaction where H2O is reduced, what ions are involved?
H+ ions.
What type of reaction is characterized by the simultaneous oxidation and reduction of a species?
Disproportionation reaction.
True or False: In disproportionation reactions, the same species can act as both an oxidant and a reductant.
True.
