Titration and pH Concepts

The video tutorial covers the differences between weak acid-weak base and strong acid-strong base titrations. It explains the titration of acetic acid with a strong base, highlighting the formation of potassium acetate and water. The concept of equivalence points is discussed, emphasizing that for weak acid-strong base titrations, the pH is greater than 7. The tutorial also explores weak base-strong acid titrations, using ammonia and HCl as examples, and explains the formation of conjugate acids and bases.

What is the nature of the pH change in a strong acid-strong base titration?

• Exponential increase

• Linear increase

• No change

• Sudden drop

Which strong base is commonly used to titrate acetic acid?

• Lithium hydroxide

• Sodium hydroxide

• Calcium hydroxide

• Magnesium hydroxide

What are the products formed when acetic acid is titrated with potassium hydroxide?

• Potassium chloride and water

• Potassium acetate and water

• Sodium acetate and water

• Acetic acid and water

At the equivalence point of a weak acid-strong base titration, the pH is:

• Less than 7

• Greater than 7

• Unpredictable

• Equal to 7

Why is the pH at the equivalence point greater than 7 in a weak acid-strong base titration?

• Due to the presence of excess acid

• Due to the formation of a conjugate weak base

• Due to the formation of a strong base

• Due to the formation of a strong acid

What is the initial pH like in a weak base-strong acid titration?

• Low pH

• High pH

• Unstable pH

• Neutral pH

In the titration of ammonia with HCl, what is formed?

• Sodium chloride

• Potassium chloride

• Ammonium chloride

• Ammonium hydroxide

What happens to the pH as a strong acid is added to a weak base?

• It increases

• It remains constant

• It decreases

• It fluctuates

At the equivalence point of a weak base-strong acid titration, the pH is:

• Less than 7

• Equal to 7

• Greater than 7

• Unpredictable

What is the conjugate acid formed when ammonia is titrated with HCl?

• HCl

• Cl-

• NH4+

• NH3