Problem: A certain indicator, HA, has a Ka value of 0.00063. The protonated form of the indicator is blue and the ionized form is yellow. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 5?           (a) green           (b) yellow          (c)  blue

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A certain indicator, HA, has a Ka value of 0.00063. The protonated form of the indicator is blue and the ionized form is yellow. 

What is the pKa of the indicator? 

What is the color of this indicator in a solution with pH = 5? 

          (a) green 

          (b) yellow

          (c)  blue

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What scientific concept do you need to know in order to solve this problem?

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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