易分解的酸常见有H2CO3,H2SO3,HNO2,HNO3,HClO,HClO4
难分解的酸常见有H3PO4,H2SO4,HF,HCl,HBr
稳定性一般般:H2S,HI
(HF,HCl高温也不分解,H2SO4,H3PO4加热到300℃也会分解)