Answer:
An aqueous solution of NaF will produce a neutral solution.
Explanation:
In order to classify the solutions, we need to dissociate all the salts and determine the conjugate pairs of base and acids.
NaNO₂ → Na⁺ + NO₂⁻
Na⁺ comes from the NaOH, a strong base, so the Na⁺ is the conjugate weak acid from the strong base. It will not react. This is a basic salt.
The NO₂⁻ is a conjugate strong base, that comes from the weak acid, nitrous acid. This ion can make hydrolisis.
NO₂⁻ + H₂O ⇄ HNO₂ + OH⁻ Kb
We give OH⁻ to medium, so solution is basic.
Li₂CO₃ → 2Li⁺ + CO₃⁻²
Li⁺ comes from the LiOH, a strong base, so the cathion is the conjugate weak acid from the strong base. It will not react
The CO₃⁻² is a conjugate strong base, that comes from the weak acid, carbonic acid. This ion can make hydrolisis.
CO₃⁻² + H₂O ⇄ HCO₃⁻ + OH⁻ Kb
NaClO₄ → Na⁺ + ClO₄⁻
Na⁺ comes from the NaOH, a strong base, so the cathion is the conjugate weak acid from the strong base. It will not react
The ClO₄⁻ is a conjugate strong base, that comes from the weak acid, perchloric acid. This ion can make hydrolisis. This is a basic salt.
ClO₄⁻ + H₂O ⇄ HClO₄⁻ + OH⁻ Kb
NH₄ClO₄ → NH₄⁺ + ClO₄⁻
Both ions can make hydrolisis. Ammonium comes from a weak base, so it is the strong conjugate base, and ClO₄⁻ is a conjugate strong base, that comes from the weak acid, perchloric acid
NH₄⁺ + H₂O ⇄ NH₃ + H₃O⁺ Ka
ClO₄⁻ + H₂O ⇄ HClO₄⁻ + OH⁻ Kb
This sort of salt are generally acid.
NaF → Na⁺ + F⁻
As we have seen, Na⁺ comes from the NaOH (a strong base) so it will not react.
This equilibrium can not occur: Na⁺ + H₂O ← NaOH + H⁺
F⁻ comes from a strong acid, HF so it will not also react. This reaction can not occur too: F⁻ + H₂O ← HF + OH⁻
We do not have reaction in this neutral salt, so the pH is neutral.
The only salt in the list that produces a neutral solution is NaClO4 because it made from a strong acid and a strong base.
When a salt is dissolved in water, the resulting solution could be acidic, basic or neutral. This would be determined by the solvation products of the salt in solution.
The only salt in the list that produces a neutral solution is NaClO4 because it made from a strong acid and a strong base.
Learn more about solvation: https://brainly.com/question/1301963
