Acid-base character of oxides

In the foregoing discussion, it is clear that many acids contain a nonmetal, oxygen, and hydrogen. This suggests that one way to prepare an acid might be to carry out a reaction of the oxide of a nonmetal with water. In fact, this is exactly the case, and many acids can be prepared in this way. For example, 

The general nature of this reaction indicates that oxides of nonmetals react with water to produce acidic solutions. Such oxides are sometimes referred to as acidic anhydrides. 

Ionic metal oxides contain the oxide ion, which is a very strong base. Therefore, the addition of a metal oxide to water will result in a basic solution as a result of the reaction 

Oxides of metals are sometimes called basic anhydrides because they react with water to produce basic solutions. Some examples of this type of reaction are the following  

As we have seen earlier in the case of proton transfer reactions such as occurs between HCl(g) and NH3(g), water is not necessary for the acid-base reaction to take place. This is also true of the reactions between the acidic oxides of nonmetals and the basic oxides of metals. In many cases, they react directly as illustrated in the following equations  

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This discussion should not be seen as explaining the acid/base character of oxides, i.e. their solubilities in water at various pH values. We are emphasising the close relationship between the acid/base behaviour of oxides and the nature of aqueous species. The dissolution of an oxide (other than a neutral oxide) in water, or in acids/alkalies, is an acid-base process, a chemical reaction rather than a mere separation of ions. The relative acid/base strengths of oxides are further discussed in Section 9.2. 

Describe the change in the acid/base character of oxides of the same ( -transition metal as the oxidation state of the metal changes from its minimum value to its maximum value. 

Appendix A). What periodic trends regarding the acid-base character of oxides do you notice b. How is the namre of the product affected by the concentrations of the reactants ... 

CHAPTER 11 Oxygen, Aqueous Solutions, and the Acid-Base Character of Oxides and Hydroxides... 

THE ACID-BASE CHARACTER OF OXIDES AND HYDROXIDES IN AQUEOUS SOLUTION THE SIXTH COMPONENT OF THE INTERCONNECTED NETWORK OF IDEAS FOR UNDERSTANDING THE PERIODIC TABLE... 

Figure 9.20 presented a summary of the five components of the interconnected network of ideas developed in Chapter 9 to begin to make sense of the periodic table. It was presented in black-and-white on page 246 and in color on the front inside cover of the text. The acid-base character of oxides and hydroxides in aqueous solution is of central-enough importance that it now becomes the sixth component of the network. We will represent it with the icon shown at left. 

In Chapter 9 we established the first five components of our interconnected network of ideas for understanding the periodic table. These included the periodic law, the uniqueness principle, the diagonal effect, the inert-pair effect, and the metal-nonmetal line. These components are summarized individually and collectively in colored figures located on the front inside cover of the book The icons for each component are shown there as well as on the bookmark pullout in the back of the text. In Chapter 10 we discussed hydrogen and the hydrides (as well as basic nuclear processes). In Chapter 11 we discussed the chemistry of oxygen, reviewed and extended our knowledge of the nature of water and aqueous solutions, and added a sixth component to our network the acid-base character of oxides and their corresponding hydroxides and oxoacids. The network with this additional component is shown in color on the top left side of the back inside cover of the book. 

The alkaline-earth metals have many similarities to the alkali metals. In both groups, the lightest element is unique, the second element is intermediate in character, the third, fourth, and fifth elements form a closely allied series, and the sixth element is rare and radioactive. The network helps us account for and predict the properties of both groups. The network components of particular importance are the periodic law, the uniqueness principle, the diagonal effect, and the acid-base character of oxides. The alkaline-earth metals have similar reducing properties, boil and melt at higher temperatures, and are less electropositive and reactive than the alkali metals. 

Acid-base character of oxide Acid Acid Acid Acid Acid... 

Periodic Trends in Bonding and Acid-Base Character of Oxides... 

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