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03-04-2020
Chemistry

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Why does the solution turn from yellow to blue?

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amaljabrA4481 amaljabrA4481

03-04-2020

Answer:

Bromothymol blue (BMB) is an indicator dye that turns yellow in the presence of acid. When carbon dioxide is added to the solution, it creates carbonic acid, lowering the pH of the solution. BMB is blue when the pH is greater than 7.6, green when the pH is between 6-7.6, and yellow when the pH is less than 6.

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