Review Quiz Acids/Bases, Compounds and Mixtures

How is a compound different from a mixture?

• Compounds are created through physical changes; mixtures are created through chemical reactions.

• Compounds, on average, are heavier than mixtures.

• Mixtures, on average, are heavier than compounds.

• Mixtures are created through physical changes; compounds are created through chemical reactions.

2. What occurs during a chemical reaction?

• Atoms of two or more elements are destroyed

• Atoms of two or more elements oppose one another

• Atoms of two or more elements bond together

• Atoms of two or more elements trade protons

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Based on the information from the movie, what can you conclude about the most common chemical compound on earth?

• It's oxygen

• It's hydrogen gas

• It's carbon dioxide

• It's water

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3. What is true of a mixture?

• It is produced through chemical reactions

• It can never be separated into its constituent substances

• It retains the properties of the substances that make it up

• It is always thicker than the two chemicals that go into it

A student is observing a substance that contains multiple element that have been chemically combine C₆H₁₂O₆(SUGAR). Which of the following best describes what the student is observing?

• Heterogeneous Mixture

• Homogeneous Mixture

• Element

• Compound

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An _____________ is a pure substance that cannot be

_____________ into simpler substances.

• Substance …. Changed

• Element … separated

• Chemical … reacted

• Electron … multiplied

How do elements differ from other pure substances?

• Elements and Pure Substances are the same.

• Pure substance cannot be broken down into substances.

• Elements can be broken down into substances.

• Elements can NOT be broken down into substances.

How can you tell baking soda from sugar?

Baking soda dissolves in water and reacts with vinegar.

Sugar dissolves in water and does not react with vinegar.

• Test if the powders dissolve in water.

• Test if the powders react with vinegar.

• Mix the two powders in water.

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Sodium is a metal that reacts violently with water. Chlorine is a poisonous gas. The combination of the two elements forms sodium chloride (salt).

What is a property of sodium chloride that is different that sodium and chlorine?

• sodium chloride is a metal.

• sodium chloride is edible.

• sodium chloride is a solid.

A combination of two or more substances that are NOT chemically combined.

• element

• compound

• density

• mixture