Definitions (Chemical Reaction)
CHEMICAL REACTION
Chemical equation: The symbolic representation of an actual
chemical change during chemical reaction is called chemical equation.
Reactants: The elements or compound that undergoes
chemical change during chemical reaction.
Products: The elements or compounds, which are formed as
a result of the chemical change in the reactants is called products.
Word equation: The chemical change that is expressed by
writing the names of reactants and products.
Formula equation: The chemical changes that is expressed by
using symbols and molecular formula of reactants and products.
Balance chemical equation: The chemical equation
in which the total numbers of atoms of the different in the reactants and the products
of the chemical equation are equal.
Catalyst: A chemical substance that changes the rate of
chemical reaction without change in itself during chemical reaction is known as
catalyst.
Positive catalyst: The catalyst which increases the rate of
chemical reaction is called positive catalyst. E.g. MnO2.
Negative Catalyst: The catalyst which decreases the rate of
chemical reaction is called negative catalyst. E.g. Glycerin.
Chemical reaction: A chemical change which involves addition,
decomposition, or displacement of atoms or groups of atoms is called chemical
reaction.
Combination reaction: The chemical reaction in which two or
more than two elements or compounds combined to form a new compound is called
combination reaction.
Decomposition reaction: The chemical reaction in which a single
molecule or a compound decomposes into two or more than two elements or
compounds is called decomposition reaction.
Displacement reaction: The chemical reaction
in which an element or a radical of a compound is displaced by another element
to form a new substance is known as displacement reaction.
Single
Displacement reaction: The chemical reaction in which an element or a radical
of a compound is displaced by another element to form a new substance is known
as displacement reaction.
Double Displacement reaction: The chemical reaction
in which two reacting molecule exchange their parent ions in aqueous solution.
Acid base/ Neutralization reaction: The chemical reaction
in which an acid reacts with base to form salt and water is called acid base
reaction.
Endothermic reaction: The reaction in which heat energy is
absorbed from the surrounding is called endothermic reaction.
Exothermic reaction: The reaction in which heat energy is released
to the surrounding is called exothermic reaction.
Molecular weight: The sum of the atomic weight of all the atoms
of the same or different elements present in a molecule is known as molecular
weight.
Promoters: A chemical used to increase the efficiency of
a catalyst are called promoters. E.g. Molybdenum.
Atomic mass unit: The mass which is
equal to (
Gram molecular mass: The molecular weight of a substance expressed
in terms of gram is called gram molecular weight.
Mole: The amount of substance which consists of same number of
particles as the number of atom in 12 gram of carbon -12 isotopes is called
mole.
Avogadro’s number: The number that is used to measure the
molecular mass of the substance.
Rate of chemical reaction: The change in the
concentration of any one of the reactant or products per unit time is called
rate of chemical reaction.
Leave a Comment