2 equations for the chemical reaction of compound, decomposition, exchange, substitution.

1) Connection: A + B = AB.

S + O2 = SO2 (when sulfur reacts with oxygen, sulfur dioxide is formed);

Br2 + H2 = 2HBr (when bromine interacts with hydrogen, hydrogen bromide is formed).

2) Decomposition: AB = A + B.

Ca (OH) 2 = CaO + H2O (when heated, calcium hydroxide decomposes into calcium oxide and water);

HCl = H + Cl (when heated, hydrochloric acid decomposes into hydrogen and chlorine).

3) Exchange: AB + BC = AB + BS.

Pb (NO3) 2 + 2NaClO2 = Pb (ClO2) 2 + 2NaNO3 (when lead nitrate interacts with sodium chlorite, lead chlorite and sodium nitrate are formed);

HMnO4 + NaOH = NaMnO4 + H2O (when manganic acid interacts with sodium hydroxide, sodium permanganate and water are formed).

4) Substitution: AB + B = AB + B.

2Bi + 3PbO = Bi2O3 + 3Pb (when bismuth and lead oxide interact, bismuth oxide and lead are formed);

2K + 2HCl = 2KCl + H2 (when potassium reacts with hydrochloric acid, potassium chloride and hydrogen are formed).