1. What is the approximate starting pH value of the strong acid A. Between pH 0

Question

1. What is the approximate starting pH value of the strong acid A. Between pH 0 and pH 1 B. Between pH 1 and pH 2 C. Between pH 2 and pH 3 D. Between pH 3 and pH 4 E. Between pH 4 and pH 5
2. What is the approximate pH range of the buffer region in the strong acid-strong base titration curve? A. Between pH 2.5 and pH 3.5 B. Between pH 3.5 and pH 4.5 C. Between 4.5 and 5.5 D. Between 5.5 and 6.5 E. There is no buffer region in a strong acid titration curve
3. What is the approximate equivalence point pH value, estimated from the strong acid-base titration curve? A. pH 3 B. pH 5 C. pH 7 D. pH 9 E. pH 11

Explanation / Answer

ANSWER

1. The pH of strong acid is between 1 and 2. Because the starting pH is between 1 and 2. Hence option (B) is correct answer

2. pH always keeps on changing hence there is no buffer range. Hence option (E) is correct answer.

3. The mid-point of the vertical region corespond to equivalence point. Hence a pH of 7 is approximately the equivalence point.

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