Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. the solution becomes completely blue after eight minutes.
what does this represent about the type of change happening in the container?
a chemical change started immediately and finished at eight minutes.
a non-chemical change started immediately and finished at eight minutes.
a chemical change occurred at four minutes.
a non-chemical change occurred at four minutes.

Option (A) is the correct answer.

Explanation:

When pH of a substance is less than 7 then the substance is known as acidic and it will change the color of blue litmus into red.

Whereas when pH of a substance is more than 7 then the substance is known as basic and it will change the color of red litmus into blue.

Therefore, when Theresa mixes two red-colored substances together in a container then change in color from red to blue displays that chemical change has occurred. This chemical change will start immediately.

Thus, we can conclude that type of change happening in the container is a chemical change that started immediately and finished at eight minutes.

The Answer is "A"

"A chemical change started immediately and finished at eight minutes."

I hope this helps!

i think they are all correct

explanation:

they seem good

the force on the thing and the distance the force moves the thing