Question

which of the following best describes the relationship between co₂ production and the color change of bromothymol blue? co₂ production results in a bright blue color. co₂ production results in a yellowish - green color. co₂ production results in a reddish - orange color. co₂ production does not affect the color change.

Explanation:

Bromothymol blue is a pH - indicator. When carbon dioxide ($CO_2$) dissolves in water, it forms carbonic acid ($H_2CO_3$), which lowers the pH. In an acidic environment, bromothymol blue changes to a yellowish - green color.

Answer:

$CO_2$ production results in a yellowish - green color.