Part 1:
The chemical equation BaNO3 + BaS2O3 -> 2BaNO3 + BaS2O3isincorrectbecausethenumberofsubstancesdoesnotremainthesamebeforeandafterthereaction. The correct chemical equation must be BaNO3 + BaS + BaS -> BaSO4 + BaNO2orBaNO3.
Part 2:
The main conditions for the reaction are temperature and pressure. If the reaction is carried out at high temperature and high pressure, the reaction rate will be faster.
Part 3:
The reaction process begins with dissolving BaNO3 and BaS in a water solution. Then, the Ba2+, NO3-, S2- ions in the solution will carry out chemical reactions to create new products, which are BaSO4 and BaNO2 or BaN2O5.
Part 4:
The phenomena that occur when the reaction takes place may be the change in color of the solution, the generation of gas (if any), or the precipitation of some solids such as BaSO4.