CONTENTS CHEMICAL REACTION CHARACTERISTICS OF CHEMICAL REACTION TYPES OF CHEMICAL EQUATION BALANCING OF CHEMICAL EQUATION HOW TO MAKE EQUATION MORE INFORMATIVE ID: 910515
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Slide1
CHEMICAL REACTIONS AND EQUATIONS
CONTENTS
CHEMICAL REACTION
CHARACTERISTICS OF CHEMICAL REACTION
TYPES OF CHEMICAL EQUATION
BALANCING OF CHEMICAL EQUATION
HOW TO MAKE EQUATION MORE INFORMATIVE
WHAT IS THE INFORMATION CONVEYED BY CHEMICAL EQUATION
TYPES OF CHEMICAL REACTIONS
Slide2SYMBOLS OF ELEMENTS
Slide3ELEMENTS WITH ATOMIC NUMBER 1 TO 20
Slide4VALENCY OF ELEMENTS
Slide5NAMES AND SYMBOLS OF IONS
Slide6Slide7TYPES OF MOLECULE
Molecule of an element:
It is made up of same type of atoms.
Eg
:
H
2
,
O
2
,
N
2
Molecule
of a compound
:
It is made up of two or more different types of atoms.
Eg
: CO
2
,
HCl
,
H
2
SO
4
etc.
Slide8Chemical Reactions
Slide9Mg +O
2
→
MgO
Slide10CHARACTERISTICS OF REACTIONS
1
.
Change
in state -
eg
:
HCl
(l} + Zn (s) → ZnCl
2
(
aq
) + H
2
(g)
CaO
(s) + H
2
O (l) → Ca( OH)
2
(
aq
)
2
. Change in
odour
:-
eg
: FeSO
4
(s) → Fe
2
O
3
(s) + SO
2
(g) + SO
3
(g)
In this reaction
smell of
rotten eggs
is obtained.
3. Change
in color -
eg
:
CuSO
4
(
aq
) + Fe (s)
→
FeSO
4
(
aq
) +Cu (s)
Blue
Pale Green
4. Evolution
of a gas -
eg
:
HCl
(l} + Zn (s) → ZnCl
2
(
aq
) + H
2
(g)
5.Change
in temperature –
eg
:
HCl
(l} + Zn (s) → ZnCl
2
(
aq
) +
H
2
(g
)