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๐Ÿงช General & Analytical Chemistry

Class 10 Chemical Equation Balancer & Practice

Class 10 CBSE, ICSE, and State Board chemical equation balancer with step-by-step Law of Conservation of Mass explanations.

Popular Reactions:

Use uppercase and lowercase symbols properly (e.g. Fe for iron, not FE). Separate with + and -> or =.

Balanced Equation:
Reaction Type: Combustion

โš–๏ธ Conservation of Mass Check (Atom Count Table)

Element Reactant Atoms (Left) Product Atoms (Right) Status

Law of Conservation of Mass

Formulated by Antoine Lavoisier in 1789, the Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction. The atoms present in the reactants are simply rearranged to form new products. Consequently, the mass of the reactants must exactly equal the mass of the products.

How to Balance Chemical Equations

  1. Write the correct formulas for all reactants and products. Never alter subscripts.
  2. Count the number of atoms of each element on both sides of the equation.
  3. Balance polyatomic ions that appear unchanged on both sides as single units.
  4. Balance hydrogen and oxygen last, as they frequently appear in multiple compounds.
  5. Multiply all coefficients by the lowest common multiple if fractional coefficients arise.
โšก Presets & Problem Types Reset to Default ×
🌿 Photosynthesis 🫁 Cellular Respiration 🔥 Methane Combustion ⚙️ Rusting of Iron 🎓 Class 10 Chemistry
Active Formula: Reactants (Mass) = Products (Mass)

๐Ÿ“Š Key Chemical Reactions & Stoichiometric Reference

Reaction Name Unbalanced Formula Balanced Equation Reaction Type
Photosynthesis CO2 + H2O -> C6H12O6 + O2 6CO2 + 6H2O -> C6H12O6 + 6O2 Synthesis / Endothermic
Cellular Respiration C6H12O6 + O2 -> CO2 + H2O C6H12O6 + 6O2 -> 6CO2 + 6H2O Combustion / Exothermic
Methane Combustion CH4 + O2 -> CO2 + H2O CH4 + 2O2 -> CO2 + 2H2O Complete Combustion
Rusting of Iron Fe + O2 -> Fe2O3 4Fe + 3O2 -> 2Fe2O3 Oxidation / Synthesis
Water Synthesis H2 + O2 -> H2O 2H2 + O2 -> 2H2O Combination Reaction
โ“ Common Questions & Answers

Frequently Asked Questions about Class 10 Chemical Equation Balancer & Practice

Why are chemical equations balanced in Class 10 science?
Chemical equations must be balanced to satisfy the Law of Conservation of Mass, which states that atoms can neither be created nor destroyed in a chemical reaction.
Can we change subscripts while balancing equations in Class 10?
No, changing subscripts changes the chemical identity of the substance. You can only adjust stoichiometric coefficients placed in front of formulas.
A chemical equation is balanced according to which law?
A chemical equation is balanced in accordance with the Law of Conservation of Mass, first formulated by Antoine Lavoisier. Matter is neither created nor destroyed during a chemical reaction.
A chemical equation is balanced by changing what?
A chemical equation is balanced strictly by changing stoichiometric coefficients (the numbers in front of chemical formulas). You must never modify chemical subscripts.
What is the difference between a balanced and unbalanced equation?
An unbalanced (skeletal) equation simply lists the reactants and products. A balanced equation has equal numbers of atoms for every element on both the reactant and product sides.
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