A student measures the pH of two solutions. Solution A has a pH of 4, and Solution B has a pH of 6. Based on this information, which of the following statements is correct?

Question

BlackTom AI · Accepted Answer

First, recall the definition of pH: it is the negative logarithm (base 10) of the hydrogen ion concentration, so pH = -log10[H+].
Then, the difference in pH between two solutions corresponds to a tenfold difference in [H+ ] for each unit of pH difference. Here, Solution A has pH 4 and Solution B has pH 6, so the difference is 2 pH units.
A 2-unit difference means [H+] changes by a factor of 10^2 = 100. Since lower pH means higher hydrogen ion concentration, Solution A (pH 4) has 100 times more hydrogen ions than Solution B (pH 6).
Now evaluate the options:
Option 1: 'Solution A has 100 times more hydrogen ions than Solution B.' This aligns with the 100x factor derived from the 2-unit pH difference, so it is correct.
Option 2: 'Solution A has 2 times more hydrogen ions than Solution B.' A 2x factor would correspond to a 0.3 pH unit difference (since 10^0.301 ≈ 2), not a 2-unit difference, so this is incorrect.
Option 3: 'Solution A has 20 times more hydrogen ions than Solution B.' A 20x factor would correspond to a pH difference of about log10(20) ≈ 1.301, not 2 units, so this is incorrect.
Option 4: 'Solution A has 1/100 the hydrogen ion concentration of Solution B.' This would imply Solution A is less acidic, opposite to the actual relation inferred from pH 4 vs 6, so this is incorrect.
In summary, the only statement that matches the relationship established by a 2-unit pH difference is that Solution A has 100 times more hydrogen ions than Solution B.

A student measures the pH of two solutions. Solution A has a pH of 4, and Solution B has a pH of 6. Based on this information, which of the following statements is correct?单项选择题

类似问题

The scale that is used to represent hydrogen ion concentrations in water, and differentiates acids and bases, is the scale.

The numbers of the pH scale, such as 3 for soda or 13 for bleach, represent the negative logarithm of their Blank ______ ion concentration.

A solution with a pH of 3 is:

Rainwater near a coal-fired power station has a pH of 3.7. Normal rainwater has a pH of 5.5.How many times greater is the concentration of H⁺ ions in the polluted rainwater compared to normal rainwater?

Rainwater near a coal-fired power station has a pH of 3.7. Normal rainwater has a pH of 5.5.How many times greater is the concentration of H⁺ ions in the polluted rainwater compared to normal rainwater?

Solution 1 has a pH of 6.4, Solution 2 has a pH of 8.1, and Solution 3 has a pH of 4.8. Which solution has the highest concentration of hydrogen ions ( H + H + )?

pH

Every increase of one pH unit indicates ______________.

更多留学生实用工具

智能学习助手

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