Question

Assuming complete dissociation, what is the pH of a 4.01 mg/L Ba(OH)2 solution?

Answer 1

Concepts and reason

stands for negative logarithm of concentration of hydrogen ion. The value increases with the decreasing concentration of hydrogen ion or with an increasing concentration of hydroxide ion.

Fundamentals

Arrhenius Acid-Base Theory:

Acid:

It is a chemical substance which donates protons (hydrogen ion, ) when dissolved in water.

For example,

Base:

It is a chemical substance which donates hydroxyl ion, when dissolved in water.

For example,

Concentration:

Molar concentration of a solution is defined as the number of moles of solute dissolved in one liter of solution. It is expressed as mol/L or M.

Dissociation constant of water: (ion product constant)

Ans:

The pH of a 4.01 mg/L solution is 9.67.