Problem 82 - Chemistry Central Science

Question

Write a balanced equation for the reaction that occurs in each of the following cases: (a) Chlorine reacts with water. (b) Barium metal is heated in an atmosphere of hydrogen gas. (c) Lithium reacts with sulfur. (d) Fluorine reacts with magnesium metal.

Step-by-Step Solution

Answer

The balanced chemical equations for the given reactions are: a) Cl2 + H2O → HCl + HClO b) Ba + H2 → BaH2 c) 2 Li + S → Li2S d) F2 + Mg → MgF2

Step 1: Identify the reactants and products

a) Chlorine reacts with water: Reactants: Chlorine (Cl2) and water (H2O). Products: Hydrochloric acid (HCl) and hypochlorous acid (HClO). b) Barium metal is heated in an atmosphere of hydrogen gas: Reactants: Barium metal (Ba) and hydrogen gas (H2). Product: Barium hydride (BaH2). c) Lithium reacts with sulfur: Reactants: Lithium (Li) and sulfur (S). Product: Lithium sulfide (Li2S). d) Fluorine reacts with magnesium metal: Reactants: Fluorine (F2) and magnesium (Mg). Product: Magnesium fluoride (MgF2).

Step 2: Write the unbalanced chemical equation

a) Cl2 + H2O → HCl + HClO b) Ba + H2 → BaH2 c) Li + S → Li2S d) F2 + Mg → MgF2

Step 3: Balance the chemical equation

a) The balanced equation for chlorine reacting with water is: Cl2 + H2O → HCl + HClO b) The balanced equation for barium metal being heated in an atmosphere of hydrogen gas is: Ba + H2 → BaH2 c) The balanced equation for lithium reacting with sulfur is: 2 Li + S → Li2S d) The balanced equation for fluorine reacting with magnesium metal: F2 + Mg → MgF2