Question

acidity changes after dry ice is added
what happens to the acidity of solutions a and b after dry ice is added?
time (sec) ph of solution a ph of solution b
0 11.0 8.5
1 10.8 8.0
2 10.2 7.2
3 9.6 6.5
4 9.0 5.8
the ph of solution a decreases, and the ph of solution b increases.
the ph of solution a increases, and the ph of solution b decreases.
the ph of solution a increases, and the ph of solution b increases.
the ph of solution a decreases, and the ph of solution b decreases.

Explanation:

Step1: Analyze pH change of solution A

As time goes from 0 to 4 seconds, the pH of solution A changes from 11.0 to 9.0. Since a lower pH indicates higher acidity and the pH value is decreasing, the acidity of solution A increases (pH decreases).

Step2: Analyze pH change of solution B

As time goes from 0 to 4 seconds, the pH of solution B changes from 8.5 to 5.8. Since a lower pH indicates higher acidity and the pH value is decreasing, the acidity of solution B increases (pH decreases).

Answer:

The pH of solution A decreases, and the pH of solution B decreases.