5 equations represents diagrammatically the characteristic of chemical equations.
Answers
Answer:
Following are different steps of writing a chemical equation:
1) Identify the type of reactant and product. Write a word equation
hydrogen gas + oxygen gas = water
2) Write the chemical formula for each of the reactants and products
H
2
+O
2
⟶H
2
O
3) Count the number of each type of atom in reactants and products
H
2
+O
2
⟶H
2
O
LHS RHS
H=2; H =2
O=2; O=1
4) Balance the equation
Compare the number of each type of atom on both sides (reactants and products) and try to balance the reaction by placing appropriate coefficients in front of the reactants and products.
2H
2
+O
2
⟶2H
2
O
5) Check whether the reaction balanced or not (Atoms on LHS= Atoms on RHS)
2H
2
+O
2
⟶2H
2
O
LHS RHS
H=4; H =4
O=2; O=2
Characteristics of Chemical Equation:
The chemical equation gives brief information about chemical reactions. They are as follows:
1) Complete information about reactants and products, e.g. number of molecules, mass, etc.
2) Physical states of substances.
3) Necessary conditions for chemical equation, e.g temperature, pressure, catalyst, etc.
4) Equation also shows if the reaction is exothermic or endothermic.
5) Equation also shows the reversibility of chemical reactions.