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Criteria for the formation of a salt bridge. A salt bridge is considered to be formed if the distance between any of the oxygen atoms of acidic residues and the nitrogen atoms of basic residues are within the cut-off distance (default 3.2 Angstroms) in at least one frame.The default distance cut-off can be changed by the user.he search can be restricted to a selection and/or a frame range given by the user. A salt bridge is considered to be formed if the distance between any of the oxygen atoms of acidic residues and the nitrogen atoms of basic residues are within the cut-off distance (default 3.2 Angstroms) in at least one frame.
Best Answer: One can think of a salt as the product of the reaction of a strong acid and a strong base. This is not always the case. Cations of weak bases are usually acidic, and anions of weak acids are usually basic. Cations of strong bases are neutral, anions of strong acids are neutral.So, ammonium salts (ammonia is a weak base) are acidic because in aqueous solution they can dissociate into ammonia and a proton. Halide anions are neutral, with the exception of F-, which is basic, because HF is a weak acid.Metal cations are generally neutral (with a few exceptions, like Fe+++). Salts of weak acid/weak base, and strong acid/strong base like ammonium cyanide and sodium chloride, are neutral. would arrange the salts this way: Neutrals: LiNO3, SrBr2, NH4CN LiNO3 and SrBr2 are the products of strong acid/strong base NH4CN is the product of weak acid/weak base Acids: NH4Br, NH4ClO4 Both are products of strong acid/weak base Bases: LiF, KCN Both are products of strong base/weak acid. Source(s):