Titration of Weak Acid with Strong Base

The video tutorial discusses titration involving a weak acid and a strong base, using acetic acid and sodium hydroxide as examples. It explains the reaction process, highlighting the formation of sodium acetate, a basic salt that affects pH. The concept of a buffer zone is introduced, where excess acid and its conjugate base coexist. The tutorial covers calculating the equivalence point, emphasizing that the volume of base needed is the same as in strong acid titration. It concludes with an analysis of the titration curve, detailing the different regions and how to calculate pH at each point.

What is the main product formed when acetic acid is titrated with sodium hydroxide?

• Sodium chloride

• Sodium acetate

• Acetic anhydride

• Hydrochloric acid

Why does sodium acetate affect the pH of the solution?

• It does not dissolve in water

• It is a neutral salt

• It is an acidic salt

• It is a basic salt

In the reaction between acetic acid and sodium hydroxide, which is the limiting reagent if you start with two moles of acetic acid and one mole of sodium hydroxide?

• Acetic acid

• Sodium hydroxide

• Water

• Sodium acetate

What type of solution is formed when a weak acid and its conjugate base are present together?

• Acidic solution

• Buffer solution

• Basic solution

• Neutral solution

What is the first step in calculating the equivalence point in a titration?

• Determine the pH

• Calculate the molarity

• Multiply concentration by volume to find millimoles

• Add more base

Why is the volume of base needed to reach the equivalence point the same for both strong and weak acids?

• Because the base is weak

• Because the reaction does not go to completion

• Because the reaction goes to completion

• Because the acid is strong

What happens to the acetate ion in solution after the equivalence point is reached?

• It remains unchanged

• It hydrolyzes and affects the pH

• It forms a precipitate

• It evaporates

Which region of the titration curve is known as the buffer zone?

• Before adding base

• Excess base region

• Equivalence point

• Excess acid region

What is the significance of the equivalence point in a titration?

• It is where the amount of acid equals the amount of base

• It is where the pH is highest

• It is where the solution becomes neutral

• It is where the reaction starts

What should you do to calculate the pH at different points in the titration?

• Set up change tables

• Add more acid

• Use a pH meter

• Measure the temperature