What is true about an acidic solution at 25°C?

Question

BlackTom AI · Accepted Answer

Question restatement: What is true about an acidic solution at 25°C?

Observation: The provided answer option is: [OH−] < 1.0 × 10−7.

Analysis of the option: In an acidic solution, the concentration of hydronium ions [H3O+] (often written as [H+]) is greater than 1.0 × 10−7 M at 25°C. The product of [H+] and [OH−] at this temperature is the ion-product constant for water, Kw = [H+][OH−] = 1.0 × 10−14. Therefore, [OH−] = Kw / [H+] < (1.0 × 10−14) / (1.0 × 10−7) = 1.0 × 10−7 M. Since [H+] is greater than 1.0 × 10−7 M in acidic solutions, [OH−] must be less than 1.0 × 10−7 M. This makes the statement [OH−] < 1.0 × 10−7 a true characterization of an acidic solution at 25°C.

Alternative considerations: If the solution were neutral, [H+] = [OH−] = 1.0 × 10−7 M, so [OH−] would equal 1.0 × 10−7 M, not less. If the solution were basic, [H+] would be less than 1.0 × 10−7 M, which would drive [OH−] above 1.0 × 10−7 M. However, those scenarios do not apply to an acidic solution, so the given statement remains consistent with the definition of acidity at 25°C.

In summary, due to Kw = 1.0 × 10−14 and the condition [H+] > 1.0 × 10−7 M for an acid at 25°C, the inequality [OH−] < 1.0 × 10−7 M is correct.

CHM-1020-LD01.2025SU Exam 2

What is true about an acidic solution at 25°C?

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CHM-1020-LD01.2025SU Exam 2

What is true about an acidic solution at 25°C?

View Explanation

Log in for full answers

Similar Questions

if a solution has a proton concentration of 10-11 M, what is the hydroxide ion concentration? Please choose the correct answer from the following choices, and then select the submit answer button.

What is the pH of a solution when [OH−] = 3.8 × 10−5. Is this solution acidic or basic?

Match the correct response When the pH of a solution rises what happens to the followings 1: [H3O+] [H3O+] 2: pOH 3: [OH-] [OH-] 4: [H3O+]x [OH-] [H3O+] x [OH-]

In a 1.2 M solution of KOH, a strong base, [H3O+] = _____, and [OH−] = _____.

As the pH of a solution rises, [H3O+] _____, pOH _____, and [OH−] _____.

A vinegar sample had a pH of 3.88. This corresponds to [OH-] =

Which of the following represents the most acidic solution?

In a 1.2 M solution of KOH, a strong base, [H3O+] = _____, and [OH−] = _____.

More Practical Tools for International Students

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