This preview shows page 1. Sign up to view the full content.
Unformatted text preview: on means sodium chloride, which is a salt under this definition. It appears that acid properties are often opposite to base properties, and vice versa; a base is an antiacid, and an acid is an antibase. Several theories have been proposed to answer the question “What is an Acid or a Base?” One of the earliest and most significant of these theories was proposed by a Swedish scientist, Svante Arrhenius in 1884. According to Arrhenius: AN ACID A BASE Is a hydrogencontaining substance that dissociates to +
produce hydrogen ions, H , in aqueous solutions Is a hydroxidecontaining substance that dissociates to produce hydroxide ions, OH , in aqueous solutions. +
The hydrogen ions, H , are produced by the dissociation of acids in water The hydroxide ions, OH , are produced by the dissociation of bases in water +
HA ¾¾¾¾> H + A Acid +
MOH ¾¾¾¾> M + OH Base An ACID SOLUTION contains an +
excess of hydrogen ions, H . A BASE SOLUTION contains an excess of hydroxide ions, OH . Examples: HCl(aq), H2SO4(aq) Examples: 2 NaOH(aq), Ca(OH)2(aq) Chemistry...
View Full Document