Acid-base properties, binary hydrogen compounds

Figure 16.12 Acid-base properties of the binary compounds of hydrogen and nonmetals of periods 2 and 3. 

Acids were first recognized as a specific class of compounds based on their properties in solutions of water. Consequently, in chemical nomenclature, the term acid usually refers to a solution in water of one of these special compounds rather than to the compound itself. For example, hydrochloric acid refers to a water solution of the molecular compound hydrogen chloride, HCl. Some common binary and oxyacids are listed in Figure 1.6. Figure 1.7 shows some common laboratory acids. 

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