Extra Credit (12/9-12/14)

Front

What is pH?

Back

pH is a scale used to measure the acidity or alkalinity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What pH value indicates an acid?

Back

A pH value less than 7 indicates an acid.

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What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and carbon (C).

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. For example, water (H2O) is a compound.

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What is the difference between a mixture and a compound?

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A mixture is a combination of two or more substances that retain their individual properties, while a compound is a substance formed from the chemical combination of elements.

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What happens when acids react with metals?

Back

When acids react with metals, they produce hydrogen gas and a salt.

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What is an example of a compound?

Back

Hydrogen peroxide (H2O2) is an example of a compound.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

What is a mixture of elements?

Back

A mixture of elements is a physical combination of two or more elements that do not chemically bond, such as a salad.

Front

What is the significance of the pH scale in chemistry?

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The pH scale is significant because it helps determine the acidity or basicity of a solution, which affects chemical reactions and biological processes.