Fe+H2SO4=FeS+H2O
I think it makes the equation to be more balanced
Ca + H2SO4 --> CaSO4 + H2
Iron + sulphuric acid ----> iron sulphate + hydrogen
When dilute sulphuric acid is added to copper oxide, a chemical reaction occurs, resulting in the formation of copper sulfate and water. The reaction can be represented by the equation: CuO + H2SO4 → CuSO4 + H2O.
Sulphuric acid, because "sulphuric" is what gives copper sulphate it's name
When lithium chloride is added to concentrated sulfuric acid, it will result in the evolution of hydrogen chloride gas due to the reaction between the two compounds. The reaction can be represented by the following equation: LiCl + H2SO4 -> HCl + LiHSO4. Hydrogen chloride gas is a strong acid and can be harmful if inhaled, so it should be handled with caution in a well-ventilated area.
The chemical equation for the reaction when copper is added to aluminum sulfate is: 3Cu + 2Al2(SO4)3 -> 3CuSO4 + 2Al
a balanced equation has equal numbers of each type of atom on each side of the equation.
FeCl+H2(g)
A coefficient.
Coefficients can be added in front of the chemical formulas to balance a chemical equation. These coefficients represent the number of molecules or atoms of each substance participating in the reaction. Balancing ensures that the same number of each type of atom is present on both sides of the equation.
For the chemical equation, simply replace the name of each compound with its chemical formula: NaOH + FeCl2 --> Fe(OH)2 + NaCl