chemical reactions & review problems. 2kclo 3 2kcl + 3o 2 element symbol element nameelement...
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Chemical Reactions & ReviewProblems
2KClO3 2KCl + 3O2
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
K potassium 1 X 2 2
Cl Chlorine 1 X 2 2
O oxygen 3 X 2 6
Answer is based on the using the elements on the REACTANT side of chemical reaction.
HCl + NaOH NaCl + H2OElement Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
Na sodium 1 X 1 1
Cl Chlorine 1 X 1 1
O oxygen 1 X 1 1
H hydrogen 2 X 1 2
Answer is based on the using the elements on the PRODUCT side of chemical reaction.
Mg+ 2HCl MgCl2 + H2
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
Mg magnesium 1 X 1 1
Cl chlorine 2 X 1 2
H hydrogen 2 X 1 2
Answer is based on the using the elements on the PRODUCT side of chemical reaction.
2H2 + O2 2H2OElement Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
H hydrogen 2 X 2 4
O oxygen 2 X 1 2
Answer is based on the using the elements on the REACTANT side of chemical reaction.
2Al + 3NiBr2 2AlBr3 + 3NiElement Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
Al Aluminum 1 X 2 2
Br Bromine 3 X 2 6
Ni nickel 1 X 3 3
Answer is based on the using the elements on the PRODUCT side of chemical reaction.
4Al + 3O2 2Al2O3
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
Al Aluminum 2 X 2 4
O oxygen 3 X 2 6
Answer is based on the using the elements on the PRODUCT side of chemical reaction.
2NaCl 2Na + Cl2
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
Na Sodium 1 X 2 2
Cl chlorine 1 X 2 2
Answer is based on the using the elements on the REACTANT side of chemical reaction.
CaCl2 + F2 CaF2 + Cl2
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
Ca calcium 1 X 1 1
Cl chlorine 1 X 2 2
F fluorine 2 X 1 2
Answer is based on the using the elements on the REACTANT side of chemical reaction.
AgNO3 + KCl AgCl + KNO3
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
Ag silver 1 X 1 1
Cl chlorine 1 X 1 1
K potassium 1 X 1 1
N Nitrogen 1 X 1 1
O Oxygen 3 X 1 3Answer is based on the using the elements on the PRODUCT side of chemical reaction.
N2 + 3H2 2NH3
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
N Nitrogen 2 X 1 2
H Hydrogen 2 X 3 6
Answer is based on the using the elements on the REACTANT side of chemical reaction.
2H2O2 2H2O + O2
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
O Oxygen 2 X 2 4
H Hydrogen 2 X 2 4
Answer is based on the using the elements on the REACTANT side of chemical reaction.
MgI2 + Br2 MgBr2 + I2
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
Mg magnesium 1 X 1 1
I Iodine 2 X 1 2
Br Bromine 2 X 1 2
Answer is based on the using the elements on the PRODUCT side of chemical reaction.
SO3 + H2O H2SO4
Element Symbol
Element Name Element Subscript
TimesX
Coefficient Number
Total # of atoms
H Hydrogen 2 X 1 2
S sulfur 1 X 1 1
O oxygen 4 X 1 4
Answer is based on the using the elements on the PRODUCT side of chemical reaction.
2KClO3 2KCl + 3O2
What type of reaction is the above reaction?
• The REACTANTS are breaking down into smaller molecules.
• Therefore a DECOMPOSITION reaction is the result.
HCl + NaOH NaCl + H2O
What type of reaction is the above reaction?
• The elements in the REACTANTS are switching with each other to become new molecules.
• Therefore a DOUBLE REPLACEMENT reaction is the result.
Mg+ 2HCl MgCl2 + H2
What type of reaction is the above reaction?.
• The elements in the REACTANTS are switching with each other to become new molecules.
• Therefore a SINGLE REPLACEMENT reaction is the result.
2H2 + O2 2H2O
What type of reaction is the above reaction?
• The elements in the REACTANTS are COMBINING with each other to become new molecules.
• Therefore a SYNTHESIS or ADDITION or BIOSYNTHESIS reaction is the result.
2Al + 3NiBr 2AlBr3 + 3Ni
What type of reaction is the above reaction?
• The elements in the REACTANTS are switching with each other to become new molecules.
• Therefore a SINGLE REPLACEMENT reaction is the result.
4Al + 3O2 2Al2O3
What type of reaction is the above reaction?
• The elements in the REACTANTS are COMBINING with each other to become new molecules.
• Therefore a SYNTHESIS or ADDITION or BIOSYNTHESIS reaction is the result.
2NaCl 2Na + Cl2
What type of reaction is the above reaction?
• The elements in the REACTANTS are BREAKING DOWN from each other to become new molecules OR elements.
• Therefore a DECOMPOSITION reaction is the result.
CaCl2 + F2 CaF2 + Cl2
What type of reaction is the above reaction?
• The elements in the REACTANTS are switching with each other to become new molecules.
• Therefore a SINGLE REPLACEMENT reaction is the result.
AgNO3 + KCl AgCl + KNO3
What type of reaction is the above reaction?
• The elements in the REACTANTS are switching with each other to become new molecules.
• Therefore a DOUBLE REPLACEMENT reaction is the result.
N2 + 3H2 2NH3
What type of reaction is the above reaction?
• The elements in the REACTANTS are COMBINING with each other to become new molecules.
• Therefore a SYNTHESIS or ADDITION or BIOSYNTHESIS reaction is the result.
2H2O2 2H2O + O2
What type of reaction is the above reaction?
• The elements in the REACTANTS are BREAKING DOWN with each other to become new molecules.
• Therefore a DECOMPOSITION reaction is the result.
MgI2 + Br2 MgBr2 + I2
What type of reaction is the above reaction?
• The elements in the REACTANTS are switching with each other to become new molecules.
• Therefore a SINGLE REPLACEMENT reaction is the result.
SO3 + H2O H2SO4
What type of reaction is the above reaction?
• The elements in the REACTANTS are COMBINING with each other to become new molecules.
• Therefore a SYNTHESIS or ADDITION or BIOSYNTHESIS reaction is the result.
Atomic Structure:
C12
6
-4A
B
C
D
What does each letter represent?