Acids and Bases

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What is an acid?

Back

An acid is a substance that donates protons (H+) in a chemical reaction. Acids typically have a sour taste and can turn blue litmus paper red. Example: Orange juice.

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What is a base?

Back

A base is a substance that accepts protons (H+) or donates hydroxide ions (OH-) in a chemical reaction. Bases usually have a bitter taste and can turn red litmus paper blue. Example: Soap.

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What is pH?

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pH is a scale used to measure how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is litmus paper used for?

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Litmus paper is used to test the acidity or basicity of a solution. It turns red in acidic solutions and blue in basic solutions.

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What are some common properties of acids?

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Common properties of acids include a sour taste, the ability to conduct electricity, and the ability to react with metals to produce hydrogen gas.

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What are some common properties of bases?

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Common properties of bases include a bitter taste, slippery feel, the ability to conduct electricity, and the ability to react with acids to form salts.

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What is a neutral substance?

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A neutral substance has a pH of 7, meaning it is neither acidic nor basic. Example: Pure water.

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What happens when an acid reacts with a base?

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When an acid reacts with a base, they neutralize each other, producing water and a salt.

Tags

NGSS.MS-PS1-5

Front

What is an example of a strong acid?

Back

An example of a strong acid is hydrochloric acid (HCl), which completely dissociates in water.

Front

What is an example of a strong base?

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An example of a strong base is sodium hydroxide (NaOH), which completely dissociates in water.