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Ba(OH)2
is a strong electrolyte.

Determine the concentration of each of the individual ions in a 0.700 M Ba(OH)2
solution.

Sagot :

CintiaSalazar

Consideting the definition of electrolyte, the concentration of Ba²⁺ is 0.750 M and the concentration of OH⁻ is 1.5 M.

Definition of electrolyte

An electrolyte is a substance that dissolves in water and gives rise to the formation of ions. Electrolytes can be weak or strong, depending on whether they are partially or totally ionized or dissociated in aqueous media.

A strong electrolyte is any substance that, when dissolved in water, exclusively causes the formation of ions with a practically irreversible dissolution reaction.

A weak electrolyte is a substance that, when dissolved in water, produces partial ions, with reversible reactions.

This case

The equation for dissociation is:

Ba(OH)₂ → Ba²⁺ + 2 OH⁻

You can observe that the mole ratio of Ba(OH)₂: Ba²⁺  is 1: 1 and the mole ratio of Ba(OH)₂: OH⁻ is 1: 2.

Since Ba(OH)₂ is a strong electrolyte, it dissociates completely. Then, the concentration of Ba²⁺ is 0.750 M and the concentration of OH⁻ is 2×0.750 M= 1.5 M

In summary, the concentration of Ba²⁺ is 0.750 M and the concentration of OH⁻ is 1.5 M.

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