Question Video: Identifying Which Group 15 Oxide Is Basic Chemistry

Which of the following group 15 oxides is considered basic? [A] Sb₂O₃ [B] P₂O₅ [C] Bi₂O₅ [D] N₂O₅ [E] NO₂


Video Transcript

Which of the following group 15 oxides is considered basic? (A) Sb2O3, (B) P2O5, (C) Bi2O5, (D) N2O5, or (E) NO2.

The group 15 elements, also called the pnictogens, include nitrogen, phosphorus, arsenic, antimony, bismuth, and moscovium. These elements have the capacity to form many different types of oxide compounds because they can exist in various different oxidation states.

Notice that no oxides are listed for moscovium, a synthetic element, as only a very small amount of moscovium has been produced and little is known about the compounds it forms.

As we descend group 15, the oxides of these elements become more basic. Nitrogen at the top of the group forms the most acidic oxides. Phosphorus oxides are also acidic. Arsenic and antimony tend to form amphoteric oxides. This means that the oxides can act as an acid or a base depending on the conditions. Bismuth near the bottom of the group forms basic oxides.

To answer the question, we need to know which of the oxides given is considered basic. Of the group 15 elements, only bismuth forms basic oxides. So answer choice (C) must be correct. In conclusion, the group 15 oxide that is considered basic is Bi2O5, answer choice (C).

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