Determine the poh of a 0.348 m ba(oh)2 solution at 25°c.

0.157

Given:

0.348 M of Ba(OH)₂ solution at 25⁰C

Question:

Determine the pOH of Ba(OH)₂.

The Process:

Ba(OH)₂ represents a strong base. The characteristic of a strong base is it has no ionization constant, Kb or the degree of ionization, α. Ba(OH)₂ is fully ionized in water.

The concentration of OH⁻ ions will determine the pOH value and pH by looking at the number of OH⁻ ions or sometimes referred to as base valence.

Let us prepare the concentration of OH⁻ ions.

∴

After obtaining the concentration of OH⁻ ions, we can immediately determine the pOH value.

Thus, we get a pOH of 0.157.

_ _ _ _ _ _ _ _ _ _

What is the pH value of the 0.348 M Ba(OH)₂ solution? Let us continue the rest of the calculation.

Recall that

∴

A pH value closes up to 14 indicates that the solution represents a very strong base. In the same way, if the pH value is very close to one, it means the solution is a very strong acid.

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