3)
\(K_2O\): oxit bazo: kali oxit
\(HCl\): axit: axit clohidric
\(ZnSO_4\): muối: kẽm sunfat
\(CaCO_3\): muối: canxi cacbonat
\(Fe(OH)_2\): bazo: sắt (II) hidroxit
\(CO_2\): oxit axit: cacbon dioxit
\(H_2O\): oxit: dihidro oxit
\(NO_2\): oxit axit: nito dioxit
\(AlCl_3\): muối: nhôm clorua
\(H_3PO_4\): axit: axit photphoric
\(NaH_2PO_4\): muối axit: natri dihidrophotphat
\(Na_3PO_4\): muối: natri photphat
\(Al_2O_3\): oxit bazo: nhôm oxit
\(SO_2\): oxit axit: lưu huỳnh dioxit
4)
\(N{a_2}O + {H_2}O\xrightarrow{{}}2NaOH\)
Natri hidroxit
\(CaO + {H_2}O\xrightarrow{{}}Ca{(OH)_2}\)
Canxi hidroxit
\(CuO\) không phản ứng.
\(BaO + {H_2}O\xrightarrow{{}}Ba{(OH)_2}\)
Bari hidroxit
\(2K + 2{H_2}O\xrightarrow{{}}2KOH + {H_2}\)
Kali hidroxit
\(2Na + 2{H_2}O\xrightarrow{{}}2NaOH + {H_2}\)
Natri hidroxit
\(Ca + 2{H_2}O\xrightarrow{{}}Ca{(OH)_2} + {H_2}\)
Canxi hidroxit
\(S{O_2} + {H_2}O\overset {} \leftrightarrows {H_2}S{O_3}\)
Axit sunfuro
\(S{O_3} + {H_2}O\xrightarrow{{}}{H_2}S{O_4}\)
Axit sunfuric
\(3{H_2}O + {P_2}{O_5}\xrightarrow{{}}2{H_3}P{O_4}\)
Axit photphoric
