List three categories of substances that can react with a base. Give one example of each and write the chemical reaction involved in each case.
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metal, acid and non metallic oxides
Explanation:
with metal
Zn + NaOH = Na2ZnO2 + H2
with metal oxides
NaOH + CO2 = Na2CO3 + H2O
with acid
NaOH + HCl = CaCl2 + Co2 + H2O
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