Acids, Bases and pH Scale

Front

What is the pH scale?

Back

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

Front

What is an acid?

Back

An acid is a substance that donates hydrogen ions (H+) when dissolved in water, resulting in an increase in hydronium ion concentration.

Front

What is a base?

Back

A base is a substance that accepts hydrogen ions (H+) or donates hydroxide ions (OH-) in a solution, resulting in a decrease in hydronium ion concentration.

Front

What is the relationship between pH and hydronium ion concentration?

Back

As the concentration of hydronium ions (H3O+) increases, the pH value decreases, indicating a more acidic solution.

Front

What pH value indicates a neutral solution?

Back

A pH value of 7 indicates a neutral solution.

Front

What pH range is considered acidic?

Back

A pH range of 0 to 6.9 is considered acidic.

Front

What pH range is considered basic?

Back

A pH range of 7.1 to 14 is considered basic.

Front

What is the significance of a pH of 1?

Back

A pH of 1 indicates a very high concentration of hydrogen ions, making the solution extremely acidic.

Front

What is the significance of a pH of 14?

Back

A pH of 14 indicates a very low concentration of hydrogen ions, making the solution extremely basic.

Front

What are some common properties of acids?

Back

Acids typically have a sour taste, can conduct electricity, and react with metals to produce hydrogen gas.