The document discusses chemical reactions and equations, highlighting the role of reactants and products in forming new substances. It explains the components of a chemical equation, including coefficients, subscripts, and symbols that indicate the state of substances and the nature of the reaction. The document also includes examples for clarification.

1. Genera
lThesis Defense

2. Let us pray!

3. Attendance

4. Chemical Reactions
and Equations

5. Chemical Reactions
• Is the process by
which a chemical
change takes place.
• A change where a
new substance is
formed.

6. Chemical Equation
• way of expressing chemical reactions
using numbers, symbols, and formulas.
Two Major Parts:
• Reactants
• Products

7. Reactant
s
• The starting materials
• These are the
substances that
changes when it is
combined with another
substance in a chemical
reaction.
Products
• The new substance
• The substances that
result of the
chemical reaction

8. Reactant
Product

10. Coefficien
t
• Is a number before
the symbol or
formula of a
substance.
Subscript
• Is the number
of atoms of the
element found
in the
substance

11. Symbols used in Chemical
Equation
Symbols Meaning
+
• Used to separate one reactant or
product from one another.
• Can be read as “reacts with”
when used in reactant, read as
“and” when it is used in product.

• Used to separate the reactants
from the products
• Read as “yields” or “produces” in
an equation.

12. Symbols used in Chemical
Equation
Symbols Meaning
(s) • Indicates that the substance is in
solid state..
(l) • Indicates that the substance is in the
liquid state
(aq) • Indicates that the substance is
dissolved in water
• Comes from the term “aqueous”
∆

• Indicates that there is heat applied or
needed to make the reaction proceed

14. C: 1 C: 1
S: 8 S: 2
4C + S8  4CS2
C + S8  CS2

15. Xe + 3F2  XeF6
Xe: 1 Xe: 1
F: 2 F: 6
Xe + F2  XeF6

16. Ag + H2S  Ag2S + H2
Ag: 1 Ag: 2
H: 2 H: 2
S: 1 S: 1
2
2Ag + H2S  Ag2S + H2

17. 2FeO + C  2Fe + CO2
FeO + C  Fe + CO2
Fe: 1 Fe: 1
O: 1 O: 2
C: 1 C: 1
2
2
2

18. Let’s try!

19. 1.SiO2 + C  SiC + CO
2.KOH + C02  K2CO3 + H2O
3.Na + Cl2  NaCl
4.H3PO4 + KOH  K3PO4 + H2O
5.K + B 2 O 3  K 2 O + B
Let’s try!

20. Thank you!