chem whatarethemechanismsofchemicalchange
Reactivity 3.1.3 - some species can act as both Brønsted-Lowry acids and bases
amphiprotic substances can act as both Brønsted-Lowry acids and bases
- to act as an acid: they must be able to dissociate and release
- to act as a base: they must be able to accept
, must have lone pair of electrons
amphoteric substances can react with both acids and bases
moving left to right across a period, the oxides transition from basic metal oxides through amphoteric oxides, to acidic oxides
nitrogen and sulfur form several different oxides, known as
these oxides can react with moisture in the atmosphere to form weak acids and react further to form strong acids.
eg:
this lowers the
challenge questions
- at ambient temperature, the polyatomic ion
may not be considered truly amphiprotic as its basic properties dominate - losing in solution is unlikely due to the instability of in water. however, when a metal hydroxide such as magnesium hydroxide is heated, it decomposes as follows:
derive the ionic form of this reaction to analyse how the hydroxide ion is showing amphiprotic behaviour here