There are many compounds when dissolved in water changes the Hydrogen ion (H+) (related to pH) concentration of to water to acid or basic sides
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 a)Binary acids: E.g. HF, HCl, HBr, HI, H2S
 
 b)Oxyacid: E.g. HNO3,
 H2SO4 , HClO4 
 c)Organic acids: E.g. 
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 •d)   Hydroxy bases: NaOH,
 Ca(OH)2   
 •e)   Amine bases:   
 CH3NH2 (methylamine) 
 •       (CH3)2NH
 (dimethylamine)
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