Chapter 19, Problem 8STP

Interpretation Introduction

Interpretation : The combination of compound and ion that would not make a useful buffer solution is to be identified.

Concept Introduction : One of the products of a neutralization reaction is salt. An anion from an acid and a cation from a base make up salt.

Answer to Problem 8STP

Correct answer: Option (C)

Sulfuric acid and sulfate ion is the compound that does not form buffer solution.

Explanation of Solution

Reason for correct option:

A buffer is a solution that retains the pH of a solution irrespective of the addition of small amounts of acids or bases.

A weak acid and one of its salts or a weak base and one of its salts are solutions that are used as buffers.

Buffers are formed by the combination of weak acids or bases with their respective salts.

Except for option C, all others are buffer solutions because sulfuric acid is a strong acid it does not form a buffer with its salt.

So, option (C) is the correct answer.

Conclusion

Reasons for incorrect options:

Option (A), (B), (D): All these options form buffer solutions since it contains weak acids and bases and their ions.