Balancing Chemical Equations - Interactive simulation

⚗️ Interactive Chemical Equation Balancing Lab

Class X Physical Science | Telangana Curriculum

🎯 Learning Objectives

• Understand the law of conservation of mass.
• Count atoms on both sides of a chemical equation.
• Use coefficients to balance chemical equations.
• Understand why subscripts must not be changed.
• Verify whether a chemical equation is balanced.

⚖️ Virtual Laboratory

Change the coefficients using the boxes. The atom counts will automatically update.

H₂

+

O₂

→

H₂O

⚪ Equation is not yet balanced.

📊 Observation Table

Element	Reactants	Products	Status
Hydrogen (H)	2	2	✓
Oxygen (O)	2	1	✗

🧠 How Does Balancing Work?

Important Rule: Do not change the subscripts in a chemical formula.

For example:

❌ H₂O → H₂O₂
This changes the substance.

Instead, change the coefficient:

2H₂ + O₂ → 2H₂O

This keeps the chemical formula unchanged.

🔬 Law of Conservation of Mass

In a chemical reaction, atoms are neither created nor destroyed. Therefore, the number of atoms of every element must be the same on both sides of a balanced chemical equation.

Mass of reactants = Mass of products

🎯 Practice Equations

Select an equation to load it into the virtual laboratory.

H₂ + Cl₂ → HCl

Mg + O₂ → MgO

Fe + O₂ → Fe₂O₃

Al + O₂ → Al₂O₃

Na + Cl₂ → NaCl

CaCO₃ → CaO + CO₂

KClO₃ → KCl + O₂

CH₄ + O₂ → CO₂ + H₂O

Zn + HCl → ZnCl₂ + H₂

NaOH + HCl → NaCl + H₂O

📝 Activity

1. Select one of the equations above.
2. Count each type of atom on both sides.
3. Change the coefficients.
4. Try to make the number of atoms equal.
5. Click Show Solution if you need help.
6. Record the balanced equation in your notebook.

💡 Key Points

• A chemical equation represents a chemical reaction.
• Reactants are written on the left side.
• Products are written on the right side.
• Coefficients are used for balancing.
• Subscripts should not be changed.
• A balanced equation obeys the law of conservation of mass.

Interactive Virtual Chemistry Laboratory
Pallerla Surender