Which 0.10M solution has the lowest pH?

NaCl, KCN, LiF, RbClO, all have the same pH.

I think that the answer is that they all have the same pH. Would you agree?

Thank you!

No. NaCl is neutral, KCN is basic, LiF is basic, RbClO is acidic.

So the lowest pH would be the acidic solution correct?

yes

To determine which 0.10M solution has the lowest pH among NaCl, KCN, LiF, and RbClO, we need to consider the strengths of the respective acids and bases formed when these salts dissolve in water.

NaCl, KCN, LiF, and RbClO are all salts composed of a cation and an anion. When these salts dissolve in water, the cation and anion separate, and their respective acids and bases may be formed.

To determine the pH of a solution, we need to analyze the behavior of the acids and bases in solution. Strong acids and bases completely dissociate in water, while weak acids and bases partially dissociate.

In this case, NaCl, KCN, LiF, and RbClO are all composed of strong cations and weak anions. Thus, the behavior of the anions in water will determine the pH of the solution.

Among the anions, ClO- (chlorate) is a weak base, while F- (fluoride), CN- (cyanide), and O2- (oxide) are weak acids. Since ClO- is the weakest base, it will have the highest tendency to dissociate and release OH- ions in water, resulting in a higher pH.

Therefore, all solutions of NaCl, KCN, LiF, RbClO will have the same pH, but it will be slightly higher due to the presence of ClO- ions.

So yes, you are correct. All the solutions have the same pH.

If you ever encounter a similar question, remember to identify the nature of the anions and cations in the salt and analyze their behavior in water to determine the pH.