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Questions and Answers
What is a pure substance?
What is a pure substance?
- A mixture that appears the same throughout.
- A method used to separate a mixture.
- Contains only one type of matter, chemically connected. (correct)
- Contains two or more different types of matter.
What is a mixture?
What is a mixture?
- A compound formed by chemical bonds.
- Contains two or more different types of matter. (correct)
- Homogeneous mixture.
- Contains only one type of matter.
What is a solution?
What is a solution?
A homogeneous mixture throughout which two or more substances are uniformly dispersed.
Soluble means a substance can be dissolved in another substance.
Soluble means a substance can be dissolved in another substance.
Insoluble means able to dissolve in another substance.
Insoluble means able to dissolve in another substance.
What is a homogeneous mixture?
What is a homogeneous mixture?
What is a heterogeneous mixture?
What is a heterogeneous mixture?
What is filtering?
What is filtering?
What is chromatography?
What is chromatography?
What is distillation?
What is distillation?
How does distillation work?
How does distillation work?
Hot tea is a heterogeneous mixture.
Hot tea is a heterogeneous mixture.
Flat pop is a homogeneous mixture.
Flat pop is a homogeneous mixture.
Carbonated pop is a homogeneous mixture.
Carbonated pop is a homogeneous mixture.
Windex is a homogeneous mixture.
Windex is a homogeneous mixture.
Raisin bran is a homogeneous mixture.
Raisin bran is a homogeneous mixture.
Tacos are a homogeneous mixture.
Tacos are a homogeneous mixture.
Vanilla ice cream is a homogeneous mixture.
Vanilla ice cream is a homogeneous mixture.
Alloys, or metal mixtures, are homogeneous.
Alloys, or metal mixtures, are homogeneous.
Lithium (Li) is a pure substance.
Lithium (Li) is a pure substance.
Lithium Chloride (LiCl) is a mixture.
Lithium Chloride (LiCl) is a mixture.
Rubbing alcohol is a pure substance.
Rubbing alcohol is a pure substance.
Glucose is a pure substance.
Glucose is a pure substance.
Distilled water is a mixture.
Distilled water is a mixture.
Tap water is a pure substance.
Tap water is a pure substance.
Coffee is a pure substance.
Coffee is a pure substance.
Steel is a pure substance.
Steel is a pure substance.
Air is a pure substance.
Air is a pure substance.
Soda pop is a pure substance.
Soda pop is a pure substance.
Salt water is a pure substance.
Salt water is a pure substance.
Cake batter is a homogeneous mixture.
Cake batter is a homogeneous mixture.
Kool-aide is a homogeneous mixture.
Kool-aide is a homogeneous mixture.
Pretzel mix is a homogeneous mixture.
Pretzel mix is a homogeneous mixture.
Fruit salad is a homogeneous mixture.
Fruit salad is a homogeneous mixture.
Gold (Au) is a pure substance.
Gold (Au) is a pure substance.
Trail mix is a pure substance.
Trail mix is a pure substance.
Helium (He) is an element.
Helium (He) is an element.
Silver (Ag) is a compound.
Silver (Ag) is a compound.
Silver chloride is an element.
Silver chloride is an element.
Propene is a compound.
Propene is a compound.
Study Notes
Pure Substances
- Defined as matter containing only one type of material chemically bonded together.
- Common examples include gold, iron, water, and oxygen.
Mixtures
- Composed of two or more different types of matter that can be separated by physical means.
- Examples include sea water, Coca-Cola, and wine.
Solutions
- A type of homogeneous mixture where two or more substances are uniformly dispersed.
Solubility
- Refers to a substance’s ability to dissolve in another substance, commonly water.
Insolubility
- Indicates the inability of a substance to dissolve in another substance, such as water.
Mixture Types
- Homogeneous Mixtures: Appear uniform throughout, such as sweet tea, air, and alloys.
- Heterogeneous Mixtures: Components are not evenly mixed, exemplified by chocolate chip cookies, smoothies, and salads.
Separation Techniques
- Filtering: A method to separate solids from liquids using filter paper based on particle size (e.g., sand from water).
- Chromatography: Separates mixtures based on differences in mass, such as separating different ink pigments.
- Distillation: Utilizes differences in boiling points for separation, followed by condensation into liquid (e.g., salt from water).
Homogeneous vs. Heterogeneous
- Hot tea and flat soda are homogeneous, implying uniformity.
- Carbonated soda, carbonated pop, raisin bran, tacos, and fruit salad are classified as heterogeneous due to visible differences in components.
Examples of Substances
- Pure Substances: Lithium (Li), lithium chloride (LiCl), rubbing alcohol, glucose, and distilled water.
- Mixtures: Tap water, coffee, steel, air, soda pop, and salt water.
- Cake batter and Kool-Aid are examples of homogeneous mixtures, while pretzel mix and fruit salad are heterogeneous.
Elements and Compounds
- Elements are pure substances like helium (He) and silver (Ag).
- Compounds include silver chloride and propene, which are formed from combinations of elements.
Studying That Suits You
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Description
Test your understanding of pure substances and mixtures with these flashcards. Learn the definitions and examples of each category, including solutions and heterogeneous mixtures. This quiz will help reinforce key concepts in chemistry.
