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Chapter 7: Problem 62

Arrange the following oxides in order of increasing acidity: $\mathrm{K}_{2} \mathrm{O}, \mathrm{BaO}, \mathrm{ZnO}, \mathrm{H}_{2} \mathrm{O}, \mathrm{CO}_{2}, \mathrm{SO}_{2}$

Short Answer

Expert verified
The order of oxides in increasing acidity is: \(\mathrm{BaO}\), \(\mathrm{K}_{2} \mathrm{O}\), \(\mathrm{ZnO}\), \(\mathrm{H}_{2} \mathrm{O}\), \(\mathrm{CO}_{2}\), \(\mathrm{SO}_{2}\).

Step by step solution

01

Identify the type of each oxide

Based on the element that the oxide is formed from, we can determine whether it is a metallic, amphoteric, or acidic oxide. 1. \(\mathrm{K}_{2} \mathrm{O}\): K is potassium which is a metal, so this is a metallic oxide. 2. \(\mathrm{BaO}\): Ba is barium, which is a metal, so this is a metallic oxide. 3. \(\mathrm{ZnO}\): Zn is zinc, which is a borderline metal, so this is an amphoteric oxide. 4. \(\mathrm{H}_{2} \mathrm{O}\): H is a non-metal, so this is an acidic oxide. 5. \(\mathrm{CO}_{2}\): C and O are non-metals, so this is an acidic oxide. 6. \(\mathrm{SO}_{2}\): S and O are non-metals, so this is an acidic oxide.
02

Arrange the metallic oxides in increasing order of acidity

As the basic character of metallic oxides increases from right to left and down the periodic table, \(\mathrm{BaO}\) is more basic (\(\mathrm{Ba}\) is at the lower left side) than \(\mathrm{K}_{2} \mathrm{O}\) (\(\mathrm{K}\) is in the middle left side). This means \(\mathrm{BaO}\) has a comparatively weaker acidic character than \(\mathrm{K}_{2} \mathrm{O}\).
03

Arrange the acidic oxides in increasing order of acidity

As the acidic character of acidic oxides increases from left to right and up the periodic table, \(\mathrm{H}_{2} \mathrm{O}\) has the weakest acidic character (H being farthest left and closest to top). The acidic character of \(\mathrm{CO}_{2}\) is lesser than that of \(\mathrm{SO}_{2}\). Therefore, the order of acidic oxides with increasing acidity is \(\mathrm{H}_{2} \mathrm{O}\), \(\mathrm{CO}_{2}\), and \(\mathrm{SO}_{2}\).
04

Combine the oxide lists

Now that we have arranged the acidic and metallic oxides in order of increasing acidity, we can put amphoteric oxide (\(\mathrm{ZnO}\)) between the metallic and acidic oxides. So the final order of oxides in increasing acidity is: \(\mathrm{BaO}\), \(\mathrm{K}_{2} \mathrm{O}\), \(\mathrm{ZnO}\), \(\mathrm{H}_{2} \mathrm{O}\), \(\mathrm{CO}_{2}\), \(\mathrm{SO}_{2}\)

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