CBSE Class 10 Visual Chemistry Laboratory

Chemistry Equation & Reaction Helper

Write, balance, and understand all 26 curriculum-verified Class 10 chemical reactions. Audit atom conservation in real time, explore reaction families, and verify observations.

Study Tools (12) Mistake Bank

The Golden Rule of Chemical Balancing: Always balance atoms by placing whole-number coefficients in front of compound formulas (e.g. 2H₂O). NEVER alter formula subscripts (e.g. changing H₂O to H₄O₂), as subscripts define unique chemical identities!

Preset:

Current Chemical Equation

\mathrm{CaO}\mathrm{(s)} + \mathrm{H_{2}O}\mathrm{(l)} \longrightarrow \mathrm{Ca(OH)_{2}}\mathrm{(aq)}

Balanced in Lowest Whole-Number Ratio!

Adjust Front Stoichiometric Coefficients

Reactants (Left Hand Side):

CaO (s)

H2O (l)

Products (Right Hand Side):

Ca(OH)2 (aq)

Live Atom Count Audit (Law of Conservation of Mass)LHS = RHS (Balanced)

Element	Reactants (LHS)	Products (RHS)	Status
Calcium (Ca)	1	1	Match
Oxygen (O)	2	2	Match
Hydrogen (H)	2	2	Match

Test a Custom Class 10 Equation

Reactants (e.g. Fe + H2O):

Products (e.g. Fe3O4 + H2):

Active Chapter:science-chemical-reactions-and-equations

Learn Chapter Notes Practise Reactions ⏱️ Chapter Test

Mastering CBSE Class 10 Chemical Equations & Reactions

1. Law of Conservation of Mass

Matter can neither be created nor destroyed in a chemical reaction. The total mass of elements present in the products of a chemical reaction has to be equal to the total mass of elements present in the reactants.

2. Coefficients vs Subscripts

Subscripts define molecular formulas and valency ratios (e.g., H₂O). To balance atoms, you must ONLY change the stoichiometric coefficients written in front of formulas (e.g., 2H₂O), never the subscripts.

3. The 5 Core Reaction Families

NCERT Class 10 classifies chemical reactions into Combination, Decomposition (thermal, electrolytic, photolytic), Displacement, Double Displacement (precipitation), and Redox (oxidation-reduction).

4. Physical States & Conditions

A complete board-exam chemical equation includes physical state notations: solid (s), liquid (l), gas (g), and aqueous solution (aq). Specific reaction conditions such as temperature (Δ), pressure, and catalysts are written above or below the arrow.