Make up the equations of chemical reactions: Sodium + sulfur = sodium sulfide. Barium Chloride

Make up the equations of chemical reactions: Sodium + sulfur = sodium sulfide. Barium Chloride + Sodium Sulfate = Barium Sulfate + Barium Chloride. Iron (III) hydroxide = iron (III) oxide + water. Potassium + copper (II) sulfate = copper + potassium sulfate

1) Sodium + sulfur = sodium sulfide (compound reaction – two simple substances form one complex):
2Na + S => Na2S;
2) Barium chloride + sodium sulfate = barium sulfate + sodium chloride (exchange reaction – two complex substances exchange their constituent parts):
BaCl2 + Na2SO4 => BaSO4 ↓ + 2NaCl;
3) Iron (III) hydroxide = iron (III) oxide + water (decomposition reaction – several simple or complex substances are formed from one substance):
2Fe (OH) 3 => Fe2O3 + 3H2O;
4) Potassium + copper (II) sulfate = copper + potassium sulfate (substitution reaction – atoms of a simple substance replace one of the atoms of a complex):
2K + CuSO4 => Cu + K2SO4.