Problem: A certain indicator, HA, has a Ka value of 1.6 times 10-6. The protonated form of the indicator is yellow and the ionized form is red. What is the pKa of the indicator? pKa = What is the color of this indicator in a solution with pH = 8?

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A certain indicator, HA, has a Ka value of 1.6 times 10-6. The protonated form of the indicator is yellow and the ionized form is red. What is the pKa of the indicator? pKa = What is the color of this indicator in a solution with pH = 8?


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Our tutors have indicated that to solve this problem you will need to apply the Acid Base Indicators concept. If you need more Acid Base Indicators practice, you can also practice Acid Base Indicators practice problems.

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Based on our data, we think this problem is relevant for Professor Hoeger's class at UCSD.