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Scrieti 3 reactii de obtinere pentru NaOH, Ca(OH)2, Cu(OH)2, KOH

Răspuns :

2 Na +2 H2O=2Na OH +H2

Na2O + H2O=2NaOH

2 NaCl + Cu (OH)2=2NaOH +CuCl2

Ca + 2H2O=Ca(OH)2 +H2

Ca O + H2O=Ca(OH)2

Ca Cl2 +Zn(OH)2=Ca(OH)2 +ZnCl2

2K +2H2O =2KOH +H2

K2O +H2O=2KOH

2 KCl +Ca(OH)2=2KOH +CaCl2