1. Fe 2 (SO 4 )3 + KOH → K2 SO4 + Fe(OH)3
2. Ca3 (PO 4 )2 + SiO2→ P4 O10 + CaSiO
3
3. KClOS3 → KClO4 + KCl
4. Al2 (SO4 )3 + Ca(OH)2 → Al(OH)3 +
CaSO4
5. H2 SO4+ HI → H2 S + I2 + H2O
6. (a−b)3 =a3 −3a2 b+3ab2 −b3
7. an ×am =a n+m
8. (an )m =anm
9. loga (xn )=nlog a (x)
10. cos(2x)=cos 2 (x)−sin 2 (x)