McCrea Physical Science Chemical Reaction
Which type of change does mixing paint represent?
Which type of change does mixing paint represent?
This chemical change describes a substances ability to burn
This chemical change describes a substances ability to burn
Phase changes are an example of a physical change. Give me all six phase changes.
Phase changes are an example of a physical change. Give me all six phase changes.
Sublimation
Deposition
Freezing
Melting
Boiling(Evaporating)
Condensation
Give me 4 examples of a physical change
Give me 4 examples of a physical change
Answer will vary
Ripping paper
Any changes of states of matter
Crumbling Paper
Bending Wire
Breaking Glass
Give me 4 pieces of evidence scientist use to identify whether a chemical reaction has occurred.
Give me 4 pieces of evidence scientist use to identify whether a chemical reaction has occurred.
Formation of a precipiate
Formation of a gas
Change in color, odor, or temperature
The substances that participate in the chemical reaction are called the
The substances that participate in the chemical reaction are called the
What are the 5 main types of chemical reactions we discussed?
What are the 5 main types of chemical reactions we discussed?
Combustion
Synthesis
Double Replacement/Displacement
Single Replacement/Displacement
Decomposition
In the equation 2H2O2 --> 2H2O + 02, what is/are the reactant(s).
In the equation 2H2O2 --> 2H2O + 02, what is/are the reactant(s).
2H2O2 -- hydrogen peroxide
This type of reaction adds heat(energy) to the area around the reaction, so this area will become warmer
This type of reaction adds heat(energy) to the area around the reaction, so this area will become warmer
What does the symbol above represent?
What does the symbol above represent?
Balance the following equation:
Na + Cl2 --> NaCl
Balance the following equation:
Na + Cl2 --> NaCl
In a chemical equation, these numbers determine the number of atoms in a molecule.
In a chemical equation, these numbers determine the number of atoms in a molecule.
Balance and classify the following reaction:
BaO + H2O --> Ba(OH)2
Balance and classify the following reaction:
BaO + H2O --> Ba(OH)2
Synthesis
Already balanced! BaO + H2O --> Ba(OH)2
Balance and Classify the following reaction
NaHCO3 --> Na2CO3 + H2O + CO2
Balance and Classify the following reaction
NaHCO3 --> Na2CO3 + H2O + CO2
Decomposition
2NaHCO3 --> Na2CO3 + H2O + CO2
Classify and balance the following equation
NaHCO3 --> Na2CO3 + H2O + CO2
Classify and balance the following equation
NaHCO3 --> Na2CO3 + H2O + CO2
Decomposition
2NaHCO3 --> Na2CO3 + H2O + CO2
A reaction in which multiple substances combine to form a new compound
A reaction in which multiple substances combine to form a new compound
Which chemical reaction category do neutralization reactions fall within?
Which chemical reaction category do neutralization reactions fall within?
Double Replacement/Displacement
This type of chemical reaction always has O2 (Oxygen gas) in the reactants and produce heat
This type of chemical reaction always has O2 (Oxygen gas) in the reactants and produce heat
The formation of H2O is an example of which type of reaction?
The formation of H2O is an example of which type of reaction?
Zn + 2HCl --> ZnCl2 + H2 is an example of which type of reaction
Zn + 2HCl --> ZnCl2 + H2 is an example of which type of reaction
Single Replacement/Displacement
If heat is absorbed it is called an ___________________ reaction
If heat is absorbed it is called an ___________________ reaction
In a chemical reaction, these determine the number of molecules/compounds and can be changed.
In a chemical reaction, these determine the number of molecules/compounds and can be changed.
Why do all equation needs to be balanced?
Why do all equation needs to be balanced?
Law of Conservation of Mass -- Mass cannot be created or destroyed. Atoms are simply rearranged.
What are the 4 factors that affect the rate of a reaction?
What are the 4 factors that affect the rate of a reaction?
Concentration
Temperature
Surface Area
Catalyst
Two parts:
What type of reaction does the graph below show?
What does a catalyst lower in a reaction?
Two parts:
What type of reaction does the graph below show?
What does a catalyst lower in a reaction?
Exothermic; Activation Energy
Balance and Classify the following equation
C6H14 + O2 --> CO2 + H2O
Balance and Classify the following equation
C6H14 + O2 --> CO2 + H2O
Comnbustion
2C6H14 + 19O2 --> 12CO2 + 14H2O
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What Would You Like To Risk?
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Go To The Final Question
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