Question

comparing relationships in a table
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: Observe pH - value changes

For solution A, the pH values are 11.0, 10.8, 10.2, 9.6, 9.0 which are decreasing.
For solution B, the pH values are 8.5, 8.0, 7.2, 6.5, 5.8 which are also decreasing.

Answer:

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