PFlashcard: Calculating pH

Front

What happens to [H₃O⁺] and [OH⁻] as a solution becomes more basic?

Back

[H₃O⁺] decreases while [OH⁻] increases.

Front

What is the pH of a solution with a hydronium ion concentration of 3.4 x 10⁻² M?

Back

1.5

Front

Define pH.

Back

pH is a measure of the acidity or basicity of a solution, calculated as the negative logarithm of the hydronium ion concentration: pH = -log[H₃O⁺].

Front

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

Back

7.0.

Front

What does a pH less than 7 indicate?

Back

A solution is acidic.

Front

What does a pH greater than 7 indicate?

Back

A solution is basic.

Front

What is the relationship between pH and [H₃O⁺]?

Back

As pH decreases, [H₃O⁺] increases.

Front

What is the formula to calculate [H₃O⁺] from pH?

Back

[H₃O⁺] = 10^(-pH).

Front

What is the pH of a solution with [H₃O⁺] = 1 x 10⁻⁴ M?

Back

4.0.

Front

What is the significance of the pH scale?

Back

It provides a way to quantify the acidity or basicity of a solution.