C3.1.2 Balancing Chemical Equations

• What is a chemical equation used to represent?

  A chemical reaction
• Coefficients in a chemical equation indicate the relative amounts of each substance.


  True
• Steps to balance a chemical equation:

  1️⃣ Write the unbalanced equation

  2️⃣ Count the atoms of each element on both sides

  3️⃣ Adjust coefficients to balance atoms

  4️⃣ Check the balanced equation
• What does the law of conservation of mass ensure in a balanced chemical equation?

  Equal atoms on both sides
• What law is satisfied when balancing chemical equations to ensure mass is neither created nor destroyed?

  Law of conservation of mass
• The balanced equation for the reaction H₂ + O₂ → H₂O is 2H₂ + O₂ → 2H₂O
• A chemical equation uses chemical formulas to represent reactants and products.

  True
• What is the general form of a chemical equation?

  Reactants → Products
• The law of conservation of mass states that mass in a closed system is neither created nor destroyed
• What must be ensured when balancing a chemical equation?

  Atoms are equal on both sides
• The law of conservation of mass states that mass is neither created nor destroyed
• The balanced equation for the reaction between hydrogen and oxygen to form water is 2H₂ + O₂ → 2H₂O
• Match the steps to balance the unbalanced equation H₂ + O₂ → H₂O with their descriptions:

  Count atoms ↔️ Ensure atoms are equal on both sides

  Adjust coefficients ↔️ Change numbers in front of reactants

  Check balance ↔️ Verify atom numbers
• What is the coefficient in front of oxygen (O₂) in the balanced equation for the formation of water?

  1
• The balanced equation for the reaction between hydrogen and oxygen to form water is 2H₂ + O₂ → 2H₂O.

  True
• Match the steps of balancing a chemical equation with their descriptions:

  Count atoms ↔️ Ensure atoms are equal on both sides

  Adjust coefficients ↔️ Change numbers in front of products

  Check balance ↔️ Verify atom numbers
• The general form of a chemical equation is: Reactants → Products
• The law of conservation of mass states that mass in a closed system is neither created nor destroyed
• A balanced chemical equation reflects the law of conservation of mass.


  True
• To balance the reaction H₂ + O₂ → H₂O, the balanced equation is 2H₂ + O₂ → 2H₂O
• Balancing a chemical equation requires counting the atoms of each element on both sides.


  True
• What ensures the law of conservation of mass is satisfied in a chemical equation?

  Balanced atoms on both sides
• Match the term with its definition:

  Reactants ↔️ Substances that start a chemical reaction

  Products ↔️ Substances formed as a result of the reaction
• Reactants are always located on the right side of the arrow in a chemical equation.

  False
• How does a balanced chemical equation reflect the law of conservation of mass?

  Equal atoms of each element
• Balancing a chemical equation satisfies the law of conservation of mass.


  True
• Steps to balance the chemical equation H₂ + O₂ → H₂O

  1️⃣ Count atoms of each element on both sides

  2️⃣ Adjust coefficients to equalize atom numbers

  3️⃣ Check the balanced equation
• What is satisfied when the atoms of each element are the same on both sides of a chemical equation?

  Law of conservation of mass
• In the balanced equation 2H₂ + O₂ → 2H₂O, there are 4 atoms of hydrogen on the reactants