In an acidic solution at 25°C, which of the following is not true?

Question

BlackTom AI · Accepted Answer

The question asks which statement is not true for an acidic solution at 25°C.
Option given: [H3O+][OH−] > Kw.
In an acidic solution, the hydronium concentration [H3O+] is greater than the hydroxide concentration [OH−]. Because Kw is a constant equal to [H3O+][OH−] at a given temperature (Kw ≈ 1.0 × 10^−14 at 25°C), a higher [H3O+] in acidic solution leads to a smaller product [H3O+][OH−] than Kw, not larger.
Therefore, the statement [H3O+][OH−] > Kw is not true in an acidic solution at 25°C because the product is actually less than Kw, not greater.
If there were other options, we would evaluate them similarly by considering how acidity shifts the balance between [H3O+] and [OH−] and how that affects the Kw product. In pure water or at neutral pH, [H3O+]=[OH−] and [H3O+][OH−] equals Kw; in acidic solutions, the product falls below Kw, and in basic solutions, it rises above Kw.

CHM-1020-LD01.2025SU Practice Exam II

In an acidic solution at 25°C, which of the following is not true?

查看解析

登录即可查看完整答案

类似问题

In the reaction, HSO4– + HS– ⇌ H2S + SO42–, which one of the sets below lists both of the acid species involved in the equilibrium?

Let's assume that an arginine side chain has a pKa of exactly 12. Which one of the following best represents the deprotonated:protonated ratio at a pH of 11?

Imagine that we are using the Henderson-Hasselbalch equation, as we frequently saw it written, to understand the protonation status of an alpha-amino group. Which one of the following best describes what [A-] represents when we're thinking about our alpha-amino group?

At what pH is a functional group expected to be ~90% deprotonated if its pKa is 4?

If a functional group has a pKa of 3, then what is the (approximate) likelihood that this functional group will be protonated at pH 5?

What is the approximate predicted level of bicarbonate for well water that has a pH of 8.0?

What is NOT true about the given chemical reaction, HF(aq) + H2O(l) ⇌ F-(aq) + H3O+(aq)

In a buffer solution, if [A−] = [HA], which of the following must be true?

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单