Binary acid

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Binary acids or Hydracids are certain molecular compounds in which hydrogen is combined with a second nonmetallic element. ^{[citation needed]}

Examples:

• HF
• H₂S
• HCl
• HBr
• HI
• HAt

Their strengths depend on the solvation of the initial acid, the H-X bond energy, 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. For example, there is a weak bond between hydrogen and iodine in hydroiodic acid, making it a very strong acid.^{[citation needed]}

Binary acids are one of two classes of acids, the second being the oxyacids, which consist of a hydrogen, oxygen, and some other element.^{[dubious – discuss][citation needed]}

The names of binary acids begin with hydro- followed by the name of the other element modified to end with -ic. ^{[citation needed]}

Some texts contrast two types of acids. 1. binary acids or hydracids and 2. oxyacids that contain oxygen.^{[dubious – discuss][citation needed]}

See also

• Acid
• Oxyacid

References

• Hill; Petrucci; McCreary; Perry. General Chemistry, Fourth Edition. New Jersey, Pearson Prentice Hall. 2005

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