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Title: Chemical Reactions and Equations
Description: These notes are helpful to class 10 students
Description: These notes are helpful to class 10 students
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Chemical Reactions and Equations
What is a Chemical Reaction?
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A Chemical Reaction is taken place when a Chemical Change occurs
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For Example, Rusting of Iron, Digestion of food, Respiration, Fermentation of grapes
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Change in color
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Evolution of Gas
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What is a Chemical Equation?
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A Chemical Equation is a simplest form to write a Chemical Reaction in the form of word
Equation
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H
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Similarly,
products are written on R
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S with a plus sign (+) between
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Unbalanced Chemical Equation
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If the number of atoms of each element is unequal at both sides, then it means mass is not same
on both side and the equation is unbalanced
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Why to balance chemical equation?
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To satisfy the Law of conservation of mass
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For Example,
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Formation of Slaked lime
CaO + H2O -> Ca[OH]2
Burning of Coal
Formation of water
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For Example,
▪ Burning of Natural Gas
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3) Decomposition Reaction
AB -> A + B
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In this reaction single reactant break down to give two or more products
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For Example,
▪ Fe + CuSO4 -> FeSO4 + Cu
▪ Zn + CuSO4 -> ZnSO4 + Cu
▪ Pb + CuCl2 -> PbCl2 + Cu
5) Double Displacement Reaction
AB + CD -> AD + CB
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A reaction in which there is a mutual exchange of ions between reactants is called Double
Displacement Reaction
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A reaction in which substance gains hydrogen and loses oxygen is called Reduction
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Effects of Oxidation in everyday life
• Corrosion
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When a metal gets attacked by a substance around it such as moisture, acid, etc
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• Rancidity
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When fats and oil get oxidized, they become rancid or their smell and taste change
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Title: Chemical Reactions and Equations
Description: These notes are helpful to class 10 students
Description: These notes are helpful to class 10 students