

Phy Sci Chem Eqns and Balancing
Presentation
•
Science
•
10th Grade
•
Hard
+5
Standards-aligned
John Oglesby
FREE Resource
14 Slides • 23 Questions
1
Phy Sci Final Exam Review Chem Equations & Balancing
2
DIATOMIC ELEMENTS
3
Multiple Select
Which of the following elements are considered diatomic? Check all.
Phosphorous
Nitrogen
Iodine
Carbon
4
Drag and Drop
5
Drag and Drop
Nitrogen reacts with Hydrogen to form Ammonia (NH3).
6
Drag and Drop
7
Drag and Drop
8
Multiple Choice
Translate the word equation below.
Hydrogen and Carbon Dioxide react to form Carbonic Acid (H2CO3).
H + CO2 → H2CO3
H → CO2 + H2CO3
H2 + CO2 → H2CO3
H2 → CO2 + H2CO3
9
Multiple Choice
Translate the word equation below.
Carbon Dioxide and Hydrogen react to form Methane (CH4) and Water
CO2 + H2O → CH4 +H2
CO2 → H2 + CH4 + H2O
CO2 + H2 + CH4 → H2O
CO2 + H2 → CH4 + H2O
10
Multiple Choice
Translate the word equation below.
Sulfur Trioxide reacts with Water to form Sulfuric Acid (H2SO4).
SO3 + H2O → H2SO4
SO3 → H2O + H2SO4
SO2 + H2O → H2SO4
SO → H2O + H2SO4
11
Multiple Choice
Translate the word equation below.
Carbon Dioxide and Water react to form Glucose (C6H12O6) and Oxygen.
CO2 + H2O → C6H12O6 + O2
CO2 + H2O + C6H12O6 → O2
CO2 + H2O → C6H12O6 + O
CO2 → H2O + C6H12O6 + O2
12
Multiple Choice
Sodium reacts with chlorine gas to produce sodium chloride.
NaCl→ Cl + Na
Na+ CO2 → NaCO2
Na + Cl2→ NaCl
Na + Cl → NaCl
13
14
15
Fill in the Blanks
16
REMEMBER
# of each element in reactants
MUST EQUAL
# of each element in products
17
18
2Al2(CO3)3
Al: 4 because 2 x 2 = 4
C: 6 because 2 x 3 = 6
O: 18 because 3 x 3 x 2 = 18
19
___ H2 + ___ O2 → ___H2O
Balance this equation.
20
21
Multiple Choice
The substances that go into a reaction are called the _______.
products
reactants
22
23
2H2 + O2 ---> 2H2O
This equation is BALANCED on both sides.
Notice that there are 4 Hydrogens and 2 Oxygens on each side.
The full-size numbers to the LEFT of the elements/compounds are called COEFFICIENTS and are the ONLY VALUES YOU CAN CHANGE.
The small numbers to the right of the elements are called SUBSCRIPTS and MUST STAY THE SAME in the equation.
24
25
26
27
Multiple Choice
What is the little number after an element in a chemical equation called?
Example: H2
Coefficient
Atom
Subscript
Equation
28
Multiple Choice
Is the following equation balanced?
Al + O2 ---> 2Al2O3
YES
NO
29
Multiple Choice
What coefficients are needed to balance the equation?
___Al + ___ O2 ---> 2Al2O3
3,2
3,4
4 , 3
4,2
30
Multiple Choice
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
2,6,3,2
it's already balanced
4,12,3,4
2,1,4,5
31
Multiple Choice
N2+O2--> _NO
1
2
3
4
32
Multiple Choice
Mg + __HCl ---> MgCl2 + H2
1
2
3
4
33
Multiple Choice
2H2 + O2 --> 2H2O
Reactants
Products
Yields
Chemical Equation
34
Multiple Choice
Balance this equation.
_SnO2 +_H2-->_Sn +_H2O
1,1,2,1
1,2,1,1
1,2,1,2
1,2,2,1
35
Multiple Choice
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
1,2,1,1
2,1,2,1
1,2,1,2
0,2,0,2
36
Multiple Choice
2NaN3 --> 2Na + ___N2
1
2
3
4
37
Multiple Choice
2KClO3 --> ___KCl + 3O2
1
2
3
4
Phy Sci Final Exam Review Chem Equations & Balancing
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