Question

Pls help ive only found the answers for “from yellow to blue”

Answer 1

C. and D.

Step-by-step explanation:

As the problem states, a solution containing bromothymol blue would turn from blue into yellow whenever CO₂ gas is added to it.

• When a person exhales, their breath contains CO₂. Thus blowing air into the solution through a straw would add CO₂ to the solution

• Yeast cells react with sugar and water and produce alcohol, CO₂ and energy; thus turning the solution yellow.