CLASS 10 NOTES
SCIENCE
Chemical Reaction
PRASHANT KIRAD
, PRASHANT KIRAD
Chemical Reaction:
It's a process where substances combine to create a new substance
with unique properties.
Chemical Equation:
A chemical equation is the symbolic representation of a chemical
reaction. Symbols and formulae of the reactants and products are used
for the same.
Example: Zinc metal reacts with dilute sulphuric acid to form zinc sulfate and
hydrogen gas.
Zinc+Sulphuric acid -----> Zinc sulfate+Hydrogen
Zn(s) + H₂SO4(aq) ----->ZnSO₁ (aq) + H2(g)
Balanced chemical equation:
A balanced chemical equation has an equal number of atoms of each
element in the reactant and product side. The chemical equation is
balanced to satisfy the law of conservation of mass in a chemical
reaction.
Example: Fe+H2O→Fe3O4+H2 (Unbalanced)
3Fe+4H2O→Fe3O4+4H2 (Balanced)
Characteristics of chemical reactions:
1. Formation of a New Substance:
● Chemical reactions result in the formation of one or more new
substances with different properties than the original substances.
SCIENCE
Chemical Reaction
PRASHANT KIRAD
, PRASHANT KIRAD
Chemical Reaction:
It's a process where substances combine to create a new substance
with unique properties.
Chemical Equation:
A chemical equation is the symbolic representation of a chemical
reaction. Symbols and formulae of the reactants and products are used
for the same.
Example: Zinc metal reacts with dilute sulphuric acid to form zinc sulfate and
hydrogen gas.
Zinc+Sulphuric acid -----> Zinc sulfate+Hydrogen
Zn(s) + H₂SO4(aq) ----->ZnSO₁ (aq) + H2(g)
Balanced chemical equation:
A balanced chemical equation has an equal number of atoms of each
element in the reactant and product side. The chemical equation is
balanced to satisfy the law of conservation of mass in a chemical
reaction.
Example: Fe+H2O→Fe3O4+H2 (Unbalanced)
3Fe+4H2O→Fe3O4+4H2 (Balanced)
Characteristics of chemical reactions:
1. Formation of a New Substance:
● Chemical reactions result in the formation of one or more new
substances with different properties than the original substances.
