Regarding the buffered solution\'s rate of change, the pH change was sporadic, c
ID: 85542 • Letter: R
Question
Regarding the buffered solution's rate of change, the pH change was sporadic, changing quickly with each additional drop of lemon juices. the pH did not change with the first few additions of lemon juice but did start to drop as the amount of lemon juice got closer to 100 drops. the pH did not change with the first few additions of lemon juice but did start to raise amount of the lemon juice got closer to 100 drops. The pH changed at an uniform rate from the addition of 1 to 100 drops of lemon juice.Explanation / Answer
Choice 2 is correct.
Reason: A buffered solution generally does not allow frequent changes in the pH even after addition of acids or bases. However, if a large and significant amount of acid or base is added to this buffered solution, the pH will definitely begin to fall or rise based upon the nature of additive. In the present case, it seems that the buffered solution has been slowly and continuously added with lemon juice drop-by-drop to a significant amount. It is very well known that lemon juice is highly acidic in nature and hence the pH will drop in any case. Thus, since the solution is buffered, it will initially prevent any change in the pH however, after addition of a significant amount of lemon juice, the pH will definitely fall owing to acidity of the lemon juice.