What is an acid? Define strong and weak acids.

What is an acid? Define strong and weak acids.

Acid:

An acid is a substance that donates protons or accepts a pair of valence electrons to form a bond.

Weak Acids:

do not completely dissociate into their ions in water.

  • H3PO4 - phosphoric acid
  • HNO2 - nitrous acid
  • C6H5COOH - benzoic acid
  • CH3COOH - acetic acid
  • HCOOH - formic acid

Strong Acids:

Strong acids dissociate completely into their ions in water, yielding one or more protons (hydrogen cations) per molecule.

  • HCl - hydrochloric acid
  • HNO3 - nitric acid
  • H2SO4 - sulfuric acid (HSO4- is a weak acid)
  • HBr - hydrobromic acid
  • HI - hydroiodic acid

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