What is a Mixture?
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Transcript of What is a Mixture?
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Tennessee SPI Objective:Differentiate between a mixture and a compound.
Science
Essential LearningStudents will compare and contrast mixtures andcompounds.
Essential Question(s)How can I recognize the differences and similaritiesbetween mixtures and a compounds?
Instructions1) First click on "View" from the top-menu bar.2) Then click on "Slide Show" from the drop-down menu.3) Then use the right-arrow button on your keyboard to advance through this presentation.
SPI 0807.9.4 Mixtures or Compounds
When you combine two or more substances together, if no chemical reaction occurs, then it is called a mixture.
NotesSPI 0807.9.4
Mixtures or Compounds
Any changes you observe in a mixture are only physical changes… no new substances are formed.
Science
…consists of two or more different elements that are chemically bonded in a chemical reaction to form a new substance.
Mixtures can be fairly easily separated back into their parts
What is a Mixture?
Air Steel Salt Water BloodMixture Examples:
Compounds CAN NOT be easily separated back into their parts
Milk
What is a Compound?
Compound Examples: NaCl CO2 C6H12O6 H2O
NotesSPI 0807.9.4
Mixtures or Compounds
EXAMPLE: A Mixture
Science
Air
Nitrogen
7N14.0
Oxygen
8O16.0
Argon
18Ar39.9
Composition of Air: 78% Nitrogen, 21% Oxygen, 1% Argon and other gases
When these ingredients are mixed together no chemical reaction occurs
NotesSPI 0807.9.4
Mixtures or Compounds
EXAMPLE: A Mixture
Science
Steel
Steel Ingredients: 98.5% Iron (Fe) and 1.5% Carbon (C)Iron
26
Fe
55.8Carbon
6
C
12.0No chemical reaction occurs when these ingredients are mixed together
NotesSPI 0807.9.4
Mixtures or Compounds
EXAMPLE: A Mixture
Science
Salt Water
Seawater Ingredients: 3.5 % dissolved salts (mostly NaCl) and 96.5%Water (H2O)
Salt WaterAtlantic Ocean Pacific Ocean
When these ingredients are mixed together no chemical reaction occurs
NotesSPI 0807.9.4
Mixtures or Compounds
EXAMPLE: AMixture
Science
Blood
Blood Ingredients: 55% Plasma (consists of 90% water, 8% Protein, 2% other)
45% Red/White blood cells and Platelets
When these ingredients are mixed together no chemical reaction occurs
NotesSPI 0807.9.4
Mixtures or Compounds
EXAMPLES: A Mixture
Science
Milk
Milk Ingredients: 88% Water, 5% Carbohydrates, 3% Fat, 3% Protein, 1% Minerals
When these ingredients are mixed together no chemical reaction occurs
NotesSPI 0807.9.4
Mixtures or Compounds
MORE EXAMPLES: Mixtures
Science
CementSalad
Soup
Cement Soup Salad
No chemical reaction occurred when these mixtures were formed
NotesSPI 0807.9.4
Mixtures or Compounds
MORE EXAMPLESMixtures
Science
Tea Kool-Aid
Tea
Energy Drinks
Soft DrinksKool-Aid Drinks
No chemical reaction occurred when these mixtures were formed
NotesSPI 0807.9.4
Mixtures or Compounds
MORE EXAMPLES: Mixtures
Science
Tacos Pizza
TacosHamburgers Pizza
Hamburgers
No chemical reaction occurred when these mixtures were formed
NOTE: A mixture may contain one or more compounds, as long asthey do not react with each other (like Kool-Aid for example)
NotesSPI 0807.9.4
Mixtures or Compounds Science
Kool-Aid drink is a mixture
Kool-Aid Ingredients: Water, sugar, flavoring agent, and a coloring agent
___________________
Kool-Aid contains two compounds:
(A) water (H2O) & (B) sugar/sucrose (C12H22O11) along with other items.
Yet these ingredients DO NOT chemically react with each other.
NotesSPI 0807.9.4
Mixtures or Compounds Science
2) If no chemical reaction occurred when youcombined the substances together, then it is a mixture.
How do I know if something is a mixture or not?
1) Mixtures can be fairly easily taken back apart.
Two Ways
Note: Look at the next slide to see ways to take mixtures apart.
Note: Look at the next slide after that to see ways to determine if a chemical reaction occurred.
NotesSPI 0807.9.4
Mixtures or Compounds Science
By hand By filtration
By distillation By magnetism
How to separate apart mixturesFour examples
Sound (sizzle, snap, crackle, pop, bang, or boom)
Smoke or Gas
Fizzing or Foaming
Explosion Heat or Light
Precipitate is formed
Note: Below are common indicators of chemical reactions
NotesSPI 0807.9.4
Mixtures or Compounds Science
Color change
How do I know if a chemical reaction occurred or not?Remember: compounds are formed during chemical reactions. So
if there is no chemical reaction, then it IS NOT a compound
If you don't see one or more of these indicators, then it probably IS NOT a chemical reaction.
.
Stand and Stretch! You have been sitting for a mighty long time. Let's take a 1 minute break to stand and stretch.
BreakTime!
SPI 0807.9.9 Periodic Table
BreakTime!
Is this a mixture or a compound?Write a capital M if you think it is a mixture.Write a capital C if you think it is a compound.
Why?…The ingredients DO NOT chemically combine
Ingredients: Water, carbohydrates, fat, protein, etc.
Review Activity
Mixture
SPI 0807.9.4 Mixtures or Compounds Science
Milk
Is this a mixture or a compound?Write a capital M if you think it is a mixture.Write a capital C if you think it is a compound.
Why?…The ingredients DO NOT chemically combine Ingredients: Water, caffeine, sugar, coloring, and flavor
Mixture
Review Activity
SPI 0807.9.4 Mixtures or Compounds Science
Monster Energy Drink
Is this a mixture or a compound?Write a capital M if you think it is a mixture.Write a capital C if you think it is a compound.
(Glucose)Why? ...has 3 atoms chemically bonded together
Compound
A chemical formula with more than one capital letter is a compound.
Review Activity
SPI 0807.9.4 Mixtures or Compounds Science
C6H12O6
Is this a mixture or a compound?Write a capital M if you think it is a mixture.Write a capital C if you think it is a compound.
Why? …The ingredients DO NOT chemically combine
Ingredients: Water, chicken, vegetables, noodles, salt, etc.
Mixture
Review Activity
SPI 0807.9.4 Mixtures or Compounds Science
Chicken Soup
Is this a mixture or a compound?Write a capital M if you think it is a mixture.Write a capital C if you think it is a compound.
(Carbon Dioxide)Why? ...has 2 atoms chemically bonded together
Compound
Review Activity
SPI 0807.9.4 Mixtures or Compounds Science
CO2
A chemical formula with more than one capital letter is a compound.