Notes

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.

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 and Salt

Mixture

Review Activity

SPI 0807.9.4 Mixtures or Compounds Science

Salt Water