Question

Write the hydrolysis reactions that will occur when then each of the following salts is added to water: NaBr, Na2CO3, NH4NO3, NaF, and C5H5NHCl. (Don’t forget to remove the spectator ions.) Predict whether each solution will be acidic, basic, or neutral in each case.

Answer 1

Here's what I get

Step-by-step explanation:

1. NaBr

NaBr is the salt of a strong acid (HBr) and a strong base (NaOH)

The conjugate base of a strong acid (Br⁻) is a weak base.

The conjugate acid of a strong base (H₂O) is a weak acid.

There will be no reaction. The solution is neutral.

2. Na₂CO₃

Na₂CO₃ is the salt of a weak acid (H₂CO₃) and a strong base (NaOH)

The conjugate base of a weak acid (HCO₃⁻) is a stronger base.

HCO₃⁻ + H₂O ⇌ H₂CO₃ + OH⁻

The reaction produces hydroxide ion. The solution will be basic.

3. NH₄NO₃

NH₄NO₃ is the salt of a strong acid (HNO₃) and a weak base (NH₃)

The conjugate acid of a weak base (NH₄⁺) is a stronger acid.

NH₄⁺ + H₂O ⇌ NH₃ + H₃O⁺

The reaction produces hydronium ion. The solution will be acidic.

4. NaF

NaF is the salt of a weak acid (HF) and a strong base (NaOH)

F⁻ + H₂O ⇌ HF + OH⁻

The reaction produces hydroxide ion. The solution will be basic.

5. C₅H₅NHCl

C₅H₅NHCl is the salt of a strong acid (HCl) and a weak base (C₅H₅N)

C₅H₅NH⁺ + H₂O ⇌ C₅H₅NH₂ + H₃O⁺

The reaction produces hydronium ion. The solution will be acidic.