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Question & Answer1
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Explore TopicChoose the Best Answer
A
The pH 3 liquid has 1000 times more hydrogen ions than the pH 6 liquid.
B
The pH 3 liquid has 3 times more hydrogen ions than the pH 6 liquid.
C
The pH 3 liquid has the same hydrogen ion concentration as the pH 6 liquid.
D
The pH 3 liquid is less acidic than the pH 6 liquid.
Understanding the Answer
Let's break down why this is correct
Answer
A pH of 3 means the liquid has a hydrogen‑ion concentration of 10⁻³ moles per liter, while a pH of 6 corresponds to 10⁻⁶ moles per liter. Because the pH scale is logarithmic, each whole‑number step changes the concentration by a factor of ten. Therefore, the pH 3 liquid contains 1,000 times more hydrogen ions than the pH 6 liquid. For example, if the pH 6 solution has 0. 001 mM of H⁺, the pH 3 solution would have about 1 mM of H⁺.
Detailed Explanation
The pH scale is logarithmic. Other options are incorrect because The idea that a 3‑unit difference equals 3 times more ions is a linear mistake; Thinking the concentrations are the same ignores the scale’s effect.
Key Concepts
pH scale and hydrogen ion concentration
Acidity and alkalinity of common liquids
Logarithmic functions in chemistry
Topic
pH Testing of Common Liquids
Difficulty
hard level question
Cognitive Level
understand
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