Which of the following indicators is used to determine the endpoint of a strong

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Question: Which of the following indicators is used to determine the endpoint of a strong acid-strong base titration?

Options:

Correct Answer: Phenolphthalein

Solution:

Phenolphthalein is commonly used for strong acid-strong base titrations as it changes color at pH 8.2-10.

Which of the following indicators is used to determine the endpoint of a strong acid-strong base titration?

Which of the following indicators is used to determine the endpoint of a strong acid-strong base titration?

Step 1: Understand what a titration is. A titration is a method used to determine the concentration of a solution by adding a solution of known concentration until a reaction is complete.
Step 2: Identify the types of solutions involved. In a strong acid-strong base titration, you are mixing a strong acid (like hydrochloric acid) with a strong base (like sodium hydroxide).
Step 3: Know what an endpoint is. The endpoint of a titration is the point at which the acid has completely reacted with the base.
Step 4: Learn about indicators. An indicator is a substance that changes color at a certain pH level, helping to identify the endpoint of the titration.
Step 5: Find out which indicator is suitable for strong acid-strong base titrations. Phenolphthalein is commonly used because it changes color in the pH range of 8.2 to 10, which is suitable for detecting the endpoint of this type of titration.

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