Binary acids or hydracids are certain molecular compounds in which hydrogen is bonded with one other nonmetallic element.
[1] This distinguishes them from other types of acids with more than two constituent elements.
Examples of binary acids: For a given binary acid where element X is bonded to H, its strength depends on the solvation of the initial acid, the bond energy between H and X,[1] the electron affinity energy of X, and the solvation energy of X.
[citation needed] Observed trends in acidity correlate with bond energies, the weaker the H-X bond, the stronger the acid.
[citation needed] In the simplest case, binary acid names are formed by combining the prefix hydro-, the name of the non-hydrogen nonmetallic element, the suffix -ic, and adding acid as a second word.