Acid Base II

Front

What salt is formed when nitrous acid is neutralized by potassium hydroxide?

Back

KNO₂

Front

What is the pH at the equivalence point of a titration involving a weak acid and a strong base?

Back

The pH at the equivalence point can be greater than 7, depending on the strength of the acid and base involved.

Front

What is the significance of the Ka value in acid-base reactions?

Back

The Ka value indicates the strength of an acid; a higher Ka value means a stronger acid.

Front

What is the pH of a 0.100 M acetic acid solution before titration? (Ka of acetic acid = 1.8E-5)

Back

The pH is 2.87.

Front

What is the net ionic equation for the neutralization of HNO₂ with potassium hydroxide?

Back

HNO₂ (aq) + OH⁻ (aq) → H₂O (l) + NO₂⁻ (aq)

Front

What is the relationship between pH and pOH in a solution?

Back

pH + pOH = 14 at 25°C.

Front

How do you calculate the pH of a weak acid solution?

Back

Use the formula: pH = -log[H⁺], where [H⁺] can be found using the acid dissociation constant (Ka).

Front

What happens to the pH of a solution when a strong base is added to a weak acid?

Back

The pH increases as the strong base neutralizes the weak acid.

Front

What is the role of a conjugate base in acid-base reactions?

Back

A conjugate base is the species that remains after an acid donates a proton.

Front

What is the difference between strong acids and weak acids?

Back

Strong acids completely dissociate in water, while weak acids only partially dissociate.