Question

"In the experimental setup below, which substance would be used to prove that the gas produced by the yeast in the vacuum bottle could change the pH of the liquid in the flask?

(1)an indicator
(2)a chemical messenger
(3)an enzyme
(4)a salt solution"

Answer 1

)a salt solution would be used to prove that the gas produced by the yeast in the vacuum bottle could change the pH of the liquid in the flask!