Write the equations of chemical reactions a) S – SO2 – Na2SO3 c) Zn – ZnO – ZnSO4 and Na2ZnO2

1. Let’s compose the equation of the reaction of sulfur combustion. Sulfur oxide (IV) is formed.

S + O2 = SO2.

SO2 – acidic oxide, reacts with alkalis, forming salts of the acid to which it corresponds (sulfurous – sulfites).

2NaOH + SO2 = Na2SO3 + H2O.

1. Let’s compose the reaction of zinc combustion. The reaction product is zinc oxide.

2Zn + O2 = 2ZnO.

Zinc oxide is an amphoteric oxide that can react with both acids and alkalis.

The reaction product between zinc oxide and sodium hydroxide is sodium zincate and water.

ZnO + 2NaOH = Na2ZnO2 + H2O.

The product of the reaction between zinc oxide and sulfuric acid is zinc sulfate and water.

ZnO + H2SO4 = ZnSO4 + H2O.