CaO ---> Ca(OH) ----> Ca(NO3)2 SO2 ----> H2SO4-----> K2SO4

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вопрос

The chemical reactions in the given sequence are as follows:

CaO (Calcium oxide) reacts with water (H2O) to form Ca(OH)2 (Calcium hydroxide):
CaO + H2O → Ca(OH)2

Ca(OH)2 (Calcium hydroxide) reacts with nitric acid (HNO3) to form Ca(NO3)2 (Calcium nitrate):
Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O

SO2 (Sulfur dioxide) reacts with water (H2O) and oxygen (O2) in the atmosphere to form H2SO4 (Sulfuric acid):
SO2 + H2O + 1/2O2 → H2SO4

H2SO4 (Sulfuric acid) can react with various metal oxides such as K2O (Potassium oxide) to form salts like K2SO4 (Potassium sulfate):
H2SO4 + K2O → K2SO4 + H2O

Therefore, the overall reaction sequence is:
CaO + H2O → Ca(OH)2
Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O
SO2 + H2O + 1/2O2 → H2SO4
H2SO4 + K2O → K2SO4 + H2O