Answer to Question #343660 in Chemistry for Nasi

Question

1.The pH sample of human blood was measured to be 7.41 at 25 degrees celsius. Calculate the hydrogen ion concentration, H' and hydroxide ion, OH for the sample.

Answer 1

Solution:

We can convert between pH and [H⁺] using the following equation:

pH = −log[H⁺]

[H⁺] = 10^−pH = 10^−7.41 = 3.89×10⁻⁸

[H⁺] = 3.89×10⁻⁸ M

For any aqueous solution at 25^∘C:

pH + pOH = 14

pOH = 14 − pH = 14 − 7.41 = 6.59

pOH = 6.59

We can convert between pOH and [OH⁻] using the following equation:

pOH = −log[OH⁻]

[OH⁻] = 10^−pOH = 10^−6.59 = 2.57×10⁻⁷

[OH⁻] = 2.57×10⁻⁷ M

Answer:

The hydrogen ion (H⁺) concentration is 3.89×10⁻⁸ M

The hydroxide ion (OH⁻) concentration is 2.57×10⁻⁷ M