What is the value of x for balanced chemical equation 3Fe + xH₂O → Fe₃O₄ + 4H₂? 

The Correct answer is 4.

Key Points

• To balance the given chemical equation 3Fe + xH₂O → Fe₃O₄ + 4H₂, we need to ensure that the number of atoms of each element on both sides of the equation is equal.
• On the product side, Fe₃O₄ contains 3 iron (Fe) atoms and 4 oxygen (O) atoms. Additionally, there are 4 molecules of hydrogen gas (H₂), which account for 8 hydrogen (H) atoms on the product side.
• On the reactant side, there are 3 iron (Fe) atoms provided by the 3Fe. However, to balance the 4 oxygen atoms and 8 hydrogen atoms on the product side, we require 4 water molecules (H₂O), as each water molecule contains 1 oxygen atom and 2 hydrogen atoms.
• Thus, the balanced equation becomes: 3Fe + 4H₂O → Fe₃O₄ + 4H₂.
• Here, the value of x = 4, which corresponds to the number of water molecules required to balance the equation.
• This balanced equation ensures the conservation of mass, as the total number of atoms of each element is the same on both sides.

 Additional Information

• Importance of Balancing Chemical Equations:
  • Balancing chemical equations ensures the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction.
  • It helps in determining the stoichiometric proportions of reactants and products in a reaction.
  • Balanced equations are essential for calculating the quantities of reactants and products in chemical processes.
• Fe₃O₄ (Magnetite):
  • Magnetite is a naturally occurring iron oxide mineral with a chemical formula of Fe₃O₄.
  • It is widely used as a source of iron in the steel manufacturing industry.
  • Magnetite is also known for its magnetic properties, making it useful in various industrial applications.