When 10 mL of 0.1 M acetic acid (pKa=5.0) is titrated against 10 mL of 0.1 M ammonia solution

step 1 In this problem, option D is correct answer as here as here. Complete neutralization complete ne

When 10 mL of 0.1 M acetic acid (pKa=5.0) is titrated...

When $10 \mathrm{~mL}$ of $0.1 \mathrm{M}$ acetic acid $(\mathrm{pKa}=5.0)$ is titrated against $10 \mathrm{~mL}$ of $0.1 \mathrm{M}$ ammonia solution $(\mathrm{pKb}=5.0)$ the equivalence point occurs at $\mathrm{pH}$ :
(a) $5.0$
(b) $6.0$
(c) $9.0$
(d) $7.0$

Key Concepts

Conjugate Acid-Base Pairs

Conjugate acid-base pairs are related species that differ by a single proton. In a titration, a weak acid reacts with a weak base to form their respective conjugate base and conjugate acid, which can influence the pH of the solution through equilibrium reactions. The relationship between the acid and base strengths (as given by pKa and pKb values) helps predict the pH of the resulting solution at the equivalence point.

Salt Hydrolysis

Salt hydrolysis refers to the reaction of a salt with water, which can alter the pH of the solution. When a salt formed from a weak acid and a weak base dissolves in water, its ions can interact with water to produce either hydronium or hydroxide ions. The net pH of the solution is determined by the balance of these interactions, often resulting in a pH near neutral if the strengths of the conjugate acid and conjugate base are similar.

Equivalence Point

The equivalence point in a titration is the stage at which the quantity of titrant added is exactly enough to completely react with the analyte according to the stoichiometry of the reaction. At the equivalence point, the amounts of acid and base (or their corresponding conjugate forms) are in balance, and the resulting pH depends on the properties of the conjugate acid-base pair formed.

Acid-Base Titration

Acid-base titration is a quantitative analytical method used to determine the concentration of an acid or a base by reacting it with a base or an acid of known concentration. This process involves the gradual addition of the titrant to the analyte until the reaction reaches completion, which is often indicated by a color change or pH change.

Weak Acid-Weak Base Reaction

A weak acid-weak base reaction involves an acid and a base that both only partially dissociate in water. When they react, they form a salt that can undergo hydrolysis, meaning the salt affects the pH of the solution in a manner that depends on the relative strengths of the weak acid and weak base.

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