Zn - Hg ও গাঢ় HCl
CuSO4+2NaOH\mathrm{CuSO}_{4}+2 \mathrm{NaOH}CuSO4+2NaOH
K2HgL4\mathrm{K}_{2} \mathrm{HgL}_{4}K2HgL4 ও KOH দ্রবণ
[Ag(NH3)2]OH\left[\mathrm{Ag}\left(\mathrm{NH}_{3}\right)_{2}\right] \mathrm{OH}[Ag(NH3)2]OH
