By : AdityaKumar Pathak
• Chemical Equation (i)
• Chemical Equation (ii)
• Characteristicsof Chemical Equations
• Chemical equation: Reactant, Pro...
A Chemical equation linkstogether the
substanceswhich react (Reactants) with
thenew substancesthat areformed
(Products).
H...
Depict the kind of reactantsreactants and productsproducts
and their relative amounts in a reaction.
4 Al(s) + 3 O2(g) 2 A...
• The equation must represent known
facts.
• The equation must contain the correct
formulas for the reactants and products...
• Reactants – the substances that exist before
a chemical change (or reaction) takes place.
• Products – the new substance...
INDE
X
TheChemical equation areof two types.
Theseare:
Word equations
 Symbol equation
• A WORD EQUATION describes chemical change using
the names of the reactants and products.
Write the word equation for the...
INDE
X
A word equation linkstogether thenamesof
thereactantswith thoseof theproducts.
For example, theword equation when
m...
INDE
X
In aword equation :
Thereactantsarewritten on theleft hand
sidewith plussign (+) between them.
Theproductsarewritte...
INDE
X
A brief representation of achemical reaction
in termsof thesubstancesinvolved.
In asymbol equation, thesymbol and
f...
Cl
Cl
Cl
H
H
H
ClClCl
Cl
HH
H
H
H2 + Cl2  HCl H2 + Cl2  2 HCl
reactants products
H
Cl
reactants products
H
Cl
2
2
2 2
2 ...
Balancing of chemical equation may be
defined as:
Theprocessof making thenumber of
different elementson both slidesof the
...
Themajor stepsinvolved in balancing achemical equation
areasfollows:
 Writethechemical equation in theform of aword equat...
I. Which of thefollowing isachemical equation
(i) Mg - O	 MgO	 (ii) H2
+ Cl2 HCl
(iii) 2H2 + O	2 2H2O	
(iv) Mg + Cl MgO	
I...
WRO	NG
ANSWER
CO	RRECT
ANSWER
II. Balancethefollowing equations:
Hydrogen + Chlorine Hydrogen Chloride
(i) H2 + Cl2 HCl (ii)2H2
+ Cl24HCl (iii)H2 + Cl2
...
WRONG
ANSWER
CORRECT
ANSWER
INDE
X
WRONG
ANSWER
CORRECT
ANSWER
INDEX
Upcoming SlideShare
Loading in …5
×

Chemical equation & writing equation

1,175 views

Published on

Published in: Education, Technology, Business
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
1,175
On SlideShare
0
From Embeds
0
Number of Embeds
4
Actions
Shares
0
Downloads
61
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide
  • A chemical equation is an expression that gives the identities and quantities of the substances in a chemical reaction Chemical formulas and other symbols are used to indicate the starting material(s) or reactant(s), which are written on the left side of the equation, and the final compound(s) or product(s), which are written on the right side. An arrow, read as yields or reacts to form, points from the reactants to the products. Abbreviations are added in parentheses as subscripts to indicate the physical state of each species:—( s ) for solid, ( l ) for liquid, ( g ) for gas, and ( aq ) for an aqueous solution. A balanced chemical equation is when both the numbers of each type of atom and the total charge are the same on both sides. A chemical reaction represents a change in the distribution of atoms but not in the number of atoms. http://img.alibaba.com/photo/10784694/Aluminum_Oxide_Abrasive_Fine_Grit_120_220_.jpg http://upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Corundum_Aluminum_Oxide_Gallantin_Co_MontanaDSC03201.jpg/600px-Corundum_Aluminum_Oxide_Gallantin_Co_MontanaDSC03201.jpg http://www.germes-online.com/direct/dbimage/50327532/Aluminum_Alloy_Pipe.jpg
  • Objectives: To identify seven elements that occur naturally as diatomic molecules, H 2 , N 2 , O 2 , F 2 , Cl 2 , Br 2 , I 2 . [HOBrFINCL twins or BrINClHOF brothers] To write a chemical equation from the description of a chemical reaction.
  • Chemical equation & writing equation

    1. 1. By : AdityaKumar Pathak
    2. 2. • Chemical Equation (i) • Chemical Equation (ii) • Characteristicsof Chemical Equations • Chemical equation: Reactant, Product & Chemical equation. • Typesof Chemical equation • Word equations • Writing word Equations(i) • Writing word Equations(ii) • Writing symbol Equations • Unbalanced and Balanced Equations • Balancing of Chemical Equation (i) • Balancing of Chemical Equation (ii) • Exercise
    3. 3. A Chemical equation linkstogether the substanceswhich react (Reactants) with thenew substancesthat areformed (Products). H2 + O2 H2O INDE X
    4. 4. Depict the kind of reactantsreactants and productsproducts and their relative amounts in a reaction. 4 Al(s) + 3 O2(g) 2 Al2O3(s) The numbers in the front are called stoichiometric coefficientsstoichiometric coefficients. The letters (s), (g), and (l) are the physical states of compounds. reactantsreactants productproduct aluminum oxide INDE X
    5. 5. • The equation must represent known facts. • The equation must contain the correct formulas for the reactants and products. • The law of conservation of mass must be satisfied. INDE X
    6. 6. • Reactants – the substances that exist before a chemical change (or reaction) takes place. • Products – the new substance(s) that are formed during the chemical changes. • CHEMICAL EQUATION indicates the reactants and products of a reaction. REACTANTS  PRODUCTS INDE X
    7. 7. INDE X TheChemical equation areof two types. Theseare: Word equations  Symbol equation
    8. 8. • A WORD EQUATION describes chemical change using the names of the reactants and products. Write the word equation for the reaction of methane gas with oxygen gas to form carbon dioxide and water. methane + oxygen Reactant Product CH4 O2 CO2 H2O+ + 22 carbon dioxide + water INDE X
    9. 9. INDE X A word equation linkstogether thenamesof thereactantswith thoseof theproducts. For example, theword equation when magnesium ribbon burnsin oxygen to form awhitepowder of magnesium oxide, may bewritten asfollows: Magnesium + Oxygen Magnesium Oxide (Reactants) (Product)
    10. 10. INDE X In aword equation : Thereactantsarewritten on theleft hand sidewith plussign (+) between them. Theproductsarewritten on theright hand sidewith plussign (+) between them. An arrow ( ) separatesthereactants from theproducts. Thedirection of thearrow head points towardstheproducts
    11. 11. INDE X A brief representation of achemical reaction in termsof thesubstancesinvolved. In asymbol equation, thesymbol and formulaeof theelementsand compounds arewritten instead of their word names. For example, burning of magnesium in oxygen to form magnesium oxidemay be written asfollows: Mg + O2 MgO INDE X
    12. 12. Cl Cl Cl H H H ClClCl Cl HH H H H2 + Cl2  HCl H2 + Cl2  2 HCl reactants products H Cl reactants products H Cl 2 2 2 2 2 2 1 1 (unbalanced) (balanced) INDE X
    13. 13. Balancing of chemical equation may be defined as: Theprocessof making thenumber of different elementson both slidesof the equation equal. INDE X
    14. 14. Themajor stepsinvolved in balancing achemical equation areasfollows:  Writethechemical equation in theform of aword equation. Keep thereactantson theleft sideand theproductson right side. Separatethem by an arrow head ( ) pointing from thereactantstowardstheproducts.  Convert theword equation into thesymbol equation by writing thesymbolsand formulaeof all thereactantsand products.  Maketheatomsof different elementson both sidesof the equation equal by asuitablemethod. Thisisknown as balancing of equation. INDE X
    15. 15. I. Which of thefollowing isachemical equation (i) Mg - O MgO (ii) H2 + Cl2 HCl (iii) 2H2 + O 2 2H2O (iv) Mg + Cl MgO INDE X
    16. 16. WRO NG ANSWER
    17. 17. CO RRECT ANSWER
    18. 18. II. Balancethefollowing equations: Hydrogen + Chlorine Hydrogen Chloride (i) H2 + Cl2 HCl (ii)2H2 + Cl24HCl (iii)H2 + Cl2 2HCl (iv) H + Cl 2HCl INDE X
    19. 19. WRONG ANSWER
    20. 20. CORRECT ANSWER
    21. 21. INDE X
    22. 22. WRONG ANSWER
    23. 23. CORRECT ANSWER
    24. 24. INDEX

    ×