Acids, Bases, and pH practice

Front

What is the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is the relationship between pH and [H+] concentration?

Back

The pH is the negative logarithm of the hydrogen ion concentration: pH = -log[H+]. A lower pH indicates a higher concentration of hydrogen ions.

Front

What is the relationship between pH and [OH-] concentration?

Back

The pH and hydroxide ion concentration are related by the equation: pH + pOH = 14. A higher pH indicates a lower concentration of hydroxide ions.

Front

What is a neutral solution?

Back

A neutral solution has a pH of 7, meaning it has equal concentrations of hydrogen ions [H+] and hydroxide ions [OH-]. Pure water is an example.

Front

What is an acid?

Back

An acid is a substance that donates hydrogen ions (H+) in a solution, resulting in a pH less than 7.

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 pH greater than 7.

Front

What happens to litmus paper when it is dipped in an acid?

Back

Litmus paper turns red when dipped in an acid.

Front

What happens to litmus paper when it is dipped in a base?

Back

Litmus paper turns blue when dipped in a base.

Front

What is the pOH scale?

Back

The pOH scale measures the basicity of a solution, similar to the pH scale, where lower values indicate higher concentrations of hydroxide ions.

Front

If the pH of a solution is 4, what is the pOH?

Back

The pOH can be calculated using the formula: pOH = 14 - pH. Therefore, pOH = 14 - 4 = 10.