Arsenic pentoxide facts for kids
Arsenic pentoxide, also known as arsenic(V) oxide, is a chemical compound. Its chemical formula is As2O5. It contains arsenic and oxide ions. The arsenic in this compound has a +5 oxidation state. This is different from the more common arsenic trioxide (As2O3), where arsenic has a +3 oxidation state. Arsenic pentoxide is very dangerous. If it gets wet, it changes into arsenic acid, which can damage metals.
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What is Arsenic Pentoxide Like?
Arsenic pentoxide is a white solid that does not have any smell. It dissolves easily in water, forming arsenic acid. Like almost all arsenic compounds, it is extremely toxic, meaning it is very harmful if swallowed or touched.
How it Reacts
Arsenic pentoxide is a strong oxidizing agent. This means it can take electrons from other substances, causing them to react. For example, it reacts with hydrochloric acid to create chlorine gas.
When heated to about 300°C, arsenic pentoxide breaks down. It turns into arsenic trioxide and releases oxygen gas. It also reacts with bases to form compounds called arsenates. This reaction needs heat to happen.
How is Arsenic Pentoxide Made?
You cannot make arsenic pentoxide by simply burning arsenic. Burning arsenic only produces arsenic trioxide (As2O3).
To make arsenic pentoxide, arsenic acid is dehydrated. This means water is removed from it. A chemical called phosphorus(V) oxide is used to remove the water.
The arsenic pentoxide then appears as a white powder.
What is Arsenic Pentoxide Used For?
Arsenic pentoxide has several uses. It is used to make pesticides, which are chemicals that kill pests. It is also used to make insecticides, which specifically kill insects. In addition, it is used in the glass industry.
More About Arsenic
See also
In Spanish: Óxido de arsénico(V) para niños
