The mixing of barium chloride and sodium sulfate is a precipitate reaction. this reaction generates barium sulfide and sodium chloride. which best describes this reaction? barium chloride and sodium sulfate are solids, and barium sulfide or sodium chloride must be a liquid. all of the materials are liquids. all of the materials are solids. barium chloride and sodium sulfate are liquids, and barium sulfide or sodium chloride must be a solid.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !