Which indicator is commonly used in a strong acid-strong base titration?

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Q: Which indicator is commonly used in a strong acid-strong base titration?

Solution: Phenolphthalein is commonly used as an indicator in strong acid-strong base titrations because it changes color around pH 8.2 to 10.

Steps: 5

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.
Step 2: Identify the types of solutions involved. In a strong acid-strong base titration, you have a strong acid (like hydrochloric acid) and a strong base (like sodium hydroxide).
Step 3: Learn about indicators. An indicator is a substance that changes color to show whether a solution is acidic or basic.
Step 4: Know the pH range of phenolphthalein. Phenolphthalein changes color in the pH range of about 8.2 to 10.
Step 5: Connect the indicator to the titration. Since the pH of a strong acid-strong base titration goes from acidic to basic, phenolphthalein is a good choice because it will change color when the solution becomes neutral or slightly basic.