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Ch.16 - Acids and Bases
Tro - Chemistry: A Molecular Approach 4th Edition
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Tro 4th EditionCh.16 - Acids and Bases문제 133
16장, 문제 133

Acid rain over the Great Lakes has a pH of about 4.5. Calculate the [H3O+] concentration of this rain and compare that value to the [H3O+] concentration of rain over the West Coast, which has a pH of 5.4. How many times more concentrated is the acid in the rain over the Great Lakes compared to the rain over the West Coast?

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Understand that pH is a measure of the hydrogen ion concentration, given by the formula \( \text{pH} = -\log[\text{H}_3\text{O}^+] \).
To find the \([\text{H}_3\text{O}^+]\) concentration for the Great Lakes rain, use the formula \([\text{H}_3\text{O}^+] = 10^{-\text{pH}}\) with \(\text{pH} = 4.5\).
Calculate \([\text{H}_3\text{O}^+]\) for the West Coast rain using the same formula with \(\text{pH} = 5.4\).
Compare the two \([\text{H}_3\text{O}^+]\) concentrations by dividing the concentration for the Great Lakes by the concentration for the West Coast.
The result of the division will tell you how many times more concentrated the acid is in the Great Lakes rain compared to the West Coast rain.

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

pH Scale

The pH scale measures the acidity or basicity of a solution, ranging from 0 to 14. A pH of 7 is neutral, while values below 7 indicate acidity and above 7 indicate basicity. Each unit change in pH represents a tenfold change in hydrogen ion concentration, making it crucial for understanding the relationship between pH and [H3O+].
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02:33
The pH Scale

[H3O+] Concentration

The concentration of hydronium ions, [H3O+], in a solution is directly related to its pH. It can be calculated using the formula [H3O+] = 10^(-pH). This relationship allows us to quantify the acidity of solutions, which is essential for comparing the acidity of different rain samples.
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가이드 코스
06:25
Hydronium Ion Concentration Example

Comparative Concentration

To compare the acidity of two solutions, one can calculate the ratio of their [H3O+] concentrations. This involves dividing the concentration of one solution by that of another. Understanding this concept is key to determining how many times more acidic one solution is compared to another, as seen in the comparison of acid rain over the Great Lakes and the West Coast.
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01:58
Comparing Binary Acid Strength
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