pH calculations Flashcard

Front

What is pH?

Back

pH is a measure of the hydrogen ion concentration in a solution, indicating its acidity or alkalinity. It is calculated as pH = -log[H+].

Front

How do you calculate pOH from pH?

Back

pOH can be calculated using the formula: pOH = 14 - pH.

Front

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

Back

The concentration of hydrogen ions [H+] is inversely related to pH; as [H+] increases, pH decreases.

Front

What is the formula to find [H+] from pH?

Back

[H+] can be calculated using the formula: [H+] = 10^(-pH).

Front

What is the formula to find pH from [H+]?

Back

pH can be calculated using the formula: pH = -log[H+].

Front

What is the pOH of a solution with a pH of 7?

Back

The pOH of a solution with a pH of 7 is 7, since pOH = 14 - pH.

Front

If [H3O+] = 1.0 x 10^-3 M, what is the pH?

Back

pH = -log(1.0 x 10^-3) = 3.

Front

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

Back

The pH of a neutral solution at 25°C is 7.

Front

How do you convert pOH to [OH-]?

Back

[OH-] can be calculated using the formula: [OH-] = 10^(-pOH).

Front

What is the pH of a solution with [OH-] = 1.0 x 10^-10 M?

Back

pH = 14 - pOH; first find pOH = -log(1.0 x 10^-10) = 10, so pH = 14 - 10 = 4.