Please I need help with skeleton equations and whether or not the equation is balanced 1. solid aluminum and hydrochloric acid ( HCI) solution react to form aluminum chloride dissolved in water and hydrogen gas.

2. Solid potassium chloride is produced from the reaction between solid potassium and chlorine gas. Stirring is an important catalyst

3. Liquid water is formed by the explosive reaction between hydrogen gas and oxygen gas

4. Magnesium metal combines with fluorine gas to make solid magnesium fluoride