.2..HCOOH +..2.K->..2. HCOOK + H₂
.2..HCOOH +...MgO ->...(HCOO)₂Mg + H₂O
.2..HCOOH +...Ca(OH)₂->...(HCOO)₂Ca + 2 H2O
.6..HCOOH + 2.Al... ->.2..(HCOO)₃Al + ..3...H₂^
.6..HCOOH + ...Fe₂O₃ -> 2 (HCOO)₃Fe +3 H₂O
...HCOOH + ...LiOH ->.......HCOOLi + H2O
...2HCOOH + ...Na₂O -> 2HCOONa + H2O
HCOOH -->h2o---> HCOO⁻ + H⁺
.2..HCOOH + 02... ->.2..CO2+.2 H2O.......