Acids & Bases

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What is a base?

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A base is a substance that can accept hydrogen ions (H+) or donate electron pairs. Bases often have a slippery feel and can turn red litmus paper blue. An example of a base is soap.

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What is an acid?

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An acid is a substance that can donate hydrogen ions (H+) and has a pH less than 7. Acids often have a sour taste. An example of an acid is orange juice.

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What is the pH scale?

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The pH scale is a measure of how acidic or basic a solution is, ranging from 0 to 14. A pH of less than 7 indicates an acidic solution, a pH of 7 is neutral, and a pH of more than 7 indicates a basic solution.

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What happens when an acid and a base are mixed?

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When an acid and a base are mixed, they neutralize each other, forming water and a salt.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a common property of acids?

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A common property of acids is that they have a sour taste and can react with metals.

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What is a common property of bases?

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A common property of bases is that they feel slippery and can turn red litmus paper blue.

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What is litmus paper used for?

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Litmus paper is used to test whether a solution is acidic or basic. It turns red in acidic solutions and blue in basic solutions.

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What is an example of a strong acid?

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An example of a strong acid is hydrochloric acid (HCl), which can be found in stomach acid.

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What is an example of a weak acid?

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An example of a weak acid is acetic acid, which is found in vinegar.

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What is an example of a strong base?

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An example of a strong base is sodium hydroxide (NaOH), commonly known as lye.