Acids & Bases Science Quiz

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Questions and Answers

What is a characteristic of acids?

Tastes bitter
Usually starts with 'H' (correct)
Has a pH greater than 7
Includes hydroxide ions

Which of the following statements about bases is true?

They end with 'ic acid'.
They taste sour.
They usually have hydroxide ions. (correct)
They conduct electricity poorly.

How much more acidic is a solution with a pH of 4 compared to a solution with a pH of 6?

1,000 times more acidic
100 times more acidic (correct)
10,000 times more acidic
10 times more acidic

What does litmus paper indicate when it turns red?

<p>The solution is acidic (A)</p> Signup and view all the answers

On the pH scale, what value represents a neutral solution?

<p>7 (B)</p> Signup and view all the answers

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Flashcards

Acid

A substance that usually starts with 'H' (hydrogen) and ends with '...ic acid'. Acids have a sour taste, are corrosive, have a pH less than 7, and are good electrical conductors.

Base

A substance that usually ends with 'OH' (hydroxide). Bases are bitter to the taste, have a pH greater than 7, and are good electrical conductors.

pH Scale

A scale used to measure the acidity or basicity of a solution. It ranges from 0 to 14, where 0 is the most acidic and 14 is the most basic.

pH Indicator

A substance that changes color depending on the pH of a solution. This helps determine whether a solution is acidic, basic, or neutral.

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pH Scale Strength

A change of one unit on the pH scale represents a tenfold change in the strength of the solution. For example, a pH of 4 is 10 times more acidic than a pH of 5.

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Study Notes

Acids & Bases

Acids: Typically begin with "H+" (hydrogen) and end with "...ic acid". Taste sour, are corrosive (can burn skin), and conduct electricity well
Bases: Usually end with "OH-" (hydroxide). Taste bitter and conduct electricity better than acids
pH Scale: Measures acidity/basicity of a solution. Neutral is 7, values below 7 are acidic, and above 7 are basic.
pH Changes: Each whole number change on the pH scale represents a 10-fold change in strength. For example, a drop from pH 6 to 4 is a 100-fold increase in acidity (10²=100)
Indicators: Chemicals that change color based on the pH of a solution. Examples include litmus paper (red=acidic, blue=basic) and universal indicators.