What are the concentrations of hydrogen ion and hydroxide ion in household ammonia, an aqueous solution of nh3 that has a ph of 11.50?

Note: hydrogen ion concentration = 3.16 x 10⁻¹² M

          hydroxide ion concentration = 3.16 x 10⁻³ M

          pH NH₃ = 11.50

Asked: concentrations of hydrogen ions and hydroxide ions in household ammonia?

pH (NH₃) = 11.50.

              pH = -log [H⁺]

              [H⁺] = 10∧ (-pH)

              [H⁺] = 10∧ (-11.5)

               [H⁺] = 3.16 · 10⁻¹² M

              [H⁺] x [OH⁻] = 10⁻¹⁴ M²

              [OH⁻] = 10⁻¹⁴ M² ÷ 3.16 x 10⁻¹² M

               [OH⁻] = 0.00316 M = 3.16 x 10⁻³ M

Thus, the concentration of hydrogen ions and hydroxide ions in household ammonia is 3.16 · 10⁻³M

In chemistry, concentration is a measure that describes the amount of substance in a mixture divided by the total volume of the mixture. There are four kinds of quantitative descriptions of concentration, namely mass concentration, molar concentration, total concentration, and volume concentration. The term concentration can be applied to all types of mixtures, but it is most often used to describe the amount of solute in the solution. Molar concentrations have variations such as normal concentration and osmotic concentration.

Solution Concentration

Concentration is a way to express the quantitative relationship between solute and solvent. Expressing the concentration of the solution there are several types, including:

1. MOL FRACTION

The mole fraction is the ratio between the number of moles of a component with the number of moles of all components contained in a solution.

The mole fraction is denoted by X.

2. PERCENT WEIGHT

Percent weight states the gram weight of the solute in 100 grams of solution.

3. MOLALITY (m)

Molality states the mole of solute in 1000 grams of solvent.

4. MOLARITY (M)

Molarity states the number of moles of solute in 1 liter of solution.

5. NORMALITY (N)

Normality represents the number of moles equivalent of solute in 1 liter of solution. For acids, 1 mole is equivalent to 1 mole of H + ions. For bases, 1 mole is equivalent to 1 mole of OH- ion.

Between Normality and Molarity there is a relationship:

N = M x valence

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definition of concentration

Solution Concentration

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Grade: College

Subject: Chemistry

keywords: concentration

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