1/
2Na+ 2H2O\(\rightarrow\) 2NaOH+ H2\(\uparrow\)
CaO+ H2O\(\rightarrow\) Ca(OH)2
CuSO4+ 2NaOH\(\rightarrow\) Cu(OH)2\(\downarrow\)+ Na2SO4
FeCl3+ 3NaOH\(\rightarrow\) Fe(OH)3\(\downarrow\)+ 3NaCl
2/
PTHH bạn tự viết nha!!!
1.Na > NaOH
Na + H2O = NaOH + 1/2 H2
CaO > Ca(OH)2
CaO + H2O = Ca(OH)2
CuSO4 > Cu(OH)2
CuSO4 + 2NaOH = Cu(OH)2 + Na2SO4
FeCl3 > Fe(OH)3
FeCl3 + 3NaOH = Fe(OH)3 + 3NaCl