Chemistry College

which of the following solutions will have the smallest ph? group of answer choices a.0.1 m koh (aq) b.0.1 m ch3nh2 (aq)
c.0.1 m cf3cooh (aq)
d.0.1 m hclo3(aq)

Answers

Answer 1

Among the given options, the strongest acid is HClO3 so, it will have the smallest pH. therefore, option d is correct. The pH of a solution is related to the concentration of H+ ions in the solution, with lower pH values corresponding to higher H+ concentrations.

HClO3 is a strong acid that dissociates completely in water, producing H+ and ClO3- ions. Therefore, a 0.1 M HClO3 solution will have a pH of:

pH = -log[H+]

[H+] = 0.1 M (because HClO3 is a strong acid and dissociates completely)

pH = -log(0.1) = 1

On the other hand, the other options are:

a. 0.1 M KOH: This is a strong base that will produce OH- ions in water. However, the concentration of OH- ions is much lower than that of H+ ions produced by HClO3. Therefore, the pH of a 0.1 M KOH solution will be higher than 7, and therefore, it will not have the smallest pH among the given options.

b. 0.1 M CH3NH2: This is a weak base that will produce some OH- ions in water. However, the concentration of OH- ions produced will be much lower than that of H+ ions produced by HClO3. Therefore, the pH of a 0.1 M CH3NH2 solution will be greater than 7, and therefore, it will not have the smallest pH among the given options.

c. 0.1 M CF3COOH: This is a weak acid that will produce some H+ ions in water. However, the concentration of H+ ions produced will be much lower than that of H+ ions produced by HClO3. Therefore, the pH of a 0.1 M CF3COOH solution will be greater than 1, and therefore, it will not have the smallest pH among the given options.

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