3. Решайте уравнения реакций, уравнивая их.
NaOH +
Na2SO4 + H2O;
Ca(OH)2 +
CaCO3 + H2O;
+ KOH = Fe(OH)3 + KCl;
Al(OH)3 (19) =
+
....;
SO3 + H2O :​
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