ACID BASE TITRATION

The shape of the titration curve for a strong acid-strong base titration is:

• a) S-shaped

• b) Sigmoidal

• c) Parabolic

• d) Linear

1. In a titration of acetic acid with sodium hydroxide, the pH at the equivalence point is:

• • A) Less than 7

• • B) Equal to 7

• • C) Greater than 7

• • D) Cannot be determined

1. Which of the following is a primary standard acid used in titration?

• • A) Hydrochloric acid

• • B) Sulfuric acid

• • C) Oxalic acid

• • D) Acetic acid

1. What is the equivalence point in an acid-base titration?

• • A) The point where the pH is neutral

• • B) The point where the amount of acid equals the amount of base

• • C) The point where the indicator changes color

• • D) The point where the solution becomes colorless

1. What is the main cause of parallax error in titration?

• • A) Incorrect indicator use

• • B) Reading the burette scale from an angle

• • C) Incomplete reaction

• • D) Contaminated glassware

What is the purpose of an acid-base titration?

• a) To determine the concentration of an unknown solution

• b) To measure the temperature change in a reaction

• c) To determine the solubility of a salt

• d) To separate different components of a mixture

What is the pH at the equivalence point in the titration of a strong acid (HCl) with a strong base (NaOH)?

• a) 4

• b) 7

• c) 9

• d) 13

Which of the following is NOT a suitable primary standard for acid-base titration?

• a) Sodium carbonate (Na₂CO₃)

• b) Potassium hydrogen phthalate (KHP)

• c) Sodium hydroxide (NaOH)

• d) Oxalic acid (H₂C₂O₄)

In a titration, the point at which the indicator changes color is called the:

• a) Equivalence point

• b) End point

• c) Stoichiometric point

• d) Neutralization point

If 25 mL of 0.1 M HCl is titrated with 0.1 M NaOH, what volume of NaOH is required to reach the equivalence point?

• a) 10 mL

• b) 25 mL

• c) 50 mL

• d) 100 mL