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Chapter 22: Problem 39

Predict whether each of the following oxides is acidic, basic, amphoteric, or neutral: (a) \(\mathrm{NO}_{2},(\mathbf{b}) \mathrm{CO}_{2},(\mathbf{c}) \mathrm{Al}_{2} \mathrm{O}_{3},(\mathbf{d}) \mathrm{CaO}\)

Short Answer

Expert verified
Based on the periodic table and properties of elements, we can predict the nature of the given oxides as follows: (a) \(\mathrm{NO}_{2}\) is an acidic oxide (formed by a non-metal), (b) \(\mathrm{CO}_{2}\) is an acidic oxide (formed by a non-metal), (c) \(\mathrm{Al}_{2} \mathrm{O}_{3}\) is an amphoteric oxide (aluminum exhibits amphoteric behavior), and (d) \(\mathrm{CaO}\) is a basic oxide (formed by a metal).

Step by step solution

01

(a) Predicting the nature of NO2

Nitrogen (\(\mathrm{N}\)) is a non-metal, and when non-metals form oxides, they tend to be acidic. Thus, \(\mathrm{NO}_{2}\) should be an acidic oxide.
02

(b) Predicting the nature of CO2

Carbon (\(\mathrm{C}\)) is also a non-metal, and as previously mentioned, non-metal oxides tend to be acidic. Therefore, \(\mathrm{CO}_{2}\) should also be an acidic oxide.
03

(c) Predicting the nature of Al2O3

Aluminum (\(\mathrm{Al}\)) is a metal, and when metals form oxides, they generally are basic. However, aluminum lies in between the boundary of metals and non-metals in the periodic table, resulting in it having amphoteric behavior. Amphoteric substances can act as both acids and bases depending on the environment they are in. Consequently, \(\mathrm{Al}_{2} \mathrm{O}_{3}\) is an amphoteric oxide.
04

(d) Predicting the nature of CaO

Calcium (\(\mathrm{Ca}\)) is a metal. Metals usually form basic oxides, so \(\mathrm{CaO}\) should be a basic oxide.

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Most popular questions from this chapter

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