Titration Techniques and Concepts

This video tutorial teaches how to perform an acid-base titration to determine the concentration of an unknown base using a known acid. It covers setting up the titration apparatus, preparing solutions, conducting the titration, and calculating results. The process involves using phenolphthalein as a pH indicator to observe color changes, indicating the neutralization point. The video also explains the formula m1v1 = m2v2 for calculating concentrations.

What is the purpose of using titration in this experiment?

• To measure the pH of a solution

• To identify the presence of an acid

• To determine the concentration of an unknown base

• To create a buffer solution

What is the known concentration of hydrochloric acid used in this experiment?

• 1.0 molar

• 0.1 molar

• 2.0 molar

• 0.5 molar

Which indicator is used in this titration process?

• Litmus

• Bromothymol blue

• Phenolphthalein

• Methyl orange

What is the role of phenolphthalein in this titration?

• To increase the reaction rate

• To neutralize the acid

• To indicate the endpoint

• To act as a catalyst

What is the initial color change observed when sodium hydroxide is added to hydrochloric acid?

• Pink to colorless

• Yellow to red

• Colorless to pink

• Blue to green

Why is it important to add sodium hydroxide drop by drop towards the end of the titration?

• To prevent the solution from boiling

• To ensure the solution remains acidic

• To accurately determine the endpoint

• To avoid spilling the solution

How many times should the titration be repeated to ensure accuracy?

• Once

• Twice

• Three times

• Four times

What should be recorded in the lab notebook after each titration?

• The time taken for the titration

• The temperature of the solution

• The volume of sodium hydroxide used

• The color of the solution

What is the formula used to calculate the unknown concentration in a titration?

• P1V1 = P2V2

• M1V1 = M2V2

• C1V1 = C2V2

• N1V1 = N2V2

What is the final step in calculating the unknown concentration after performing the titration?

• Measuring the pH

• Repeating the titration

• Calculating the mean volume

• Using the titration formula