Front

What is pH?

Back

pH is a measure of the hydrogen ion concentration in a solution, indicating its acidity or basicity on a scale from 0 to 14.

Front

What is the relationship between pH and pOH?

Back

pH + pOH = 14. This equation shows that as the acidity (pH) increases, the basicity (pOH) decreases, and vice versa.

Front

If the pH of a solution is 4.0, what is the pOH?

Back

10.0

Front

What happens to hydroxide ion concentration when hydrogen ion concentration is very high?

Back

The hydroxide ion concentration is very low.

Front

How do you calculate the concentration of hydrogen ions from pH?

Back

[H3O+] = 10^(-pH). For example, if pH = 8.43, then [H3O+] = 1.0 x 10^-8.43.

Front

If the [OH-] of a solution is 2.7 x 10^-4 M, what is the pOH?

Back

3.57

Front

What does a pOH of 2 indicate about a solution?

Back

A pOH of 2 indicates that the solution is basic.

Front

What is the pH of a neutral solution at 25°C?

Back

7.0

Front

What is the significance of a pH less than 7?

Back

A pH less than 7 indicates that the solution is acidic.

Front

What is the significance of a pH greater than 7?

Back

A pH greater than 7 indicates that the solution is basic.