Question

When setting up your acid-base titration experiment, which substance is added to the buret and which is pipetted into the Erlenmeyer flask? One to two drops of _____ are added to the Erlenmeyer flask along with additional water to bring the total volume to 50 mL before beginning the titration.

a) Acidic solution, Base solution, Indicator
b) Base solution, Acidic solution, Indicator
c) Indicator, Acidic solution, Base solution
d) Indicator, Base solution, Acidic solution

Answer 1

In an acid-base titration, base solution is added to the buret and an acidic solution is pipetted into an Erlenmeyer flask. One to two drops of an indicator, and additional water, are also added into the flask to prepare for the titration.

Step-by-step explanation:

In an acid-base titration setup, the substance typically added to the buret is a base solution of known concentration. This allows for precise control over the amount of base added to the reaction mixture.

Conversely, a measured volume of an acidic solution with an unknown concentration is pipetted into the Erlenmeyer flask. To this flask, one to two drops of an indicator, such as phenolphthalein, are added, along with additional water to bring the total volume to 50 mL.

The titration process involves slowly adding the base from the buret into the acidic solution in the flask while continuously swirling to ensure proper mixing. The indicator will exhibit a color change when the solution in the flask reaches the equivalence point, indicating that the neutralization reaction is complete.