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Ch. 3 - Water and Life
Campbell - Campbell Biology 12th Edition
Urry12th EditionCampbell BiologyISBN: 9785794169850당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Urry 12th EditionCh. 3 - Water and Life문제 3
3장, 문제 3

Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?
a. 4.0 M
b. 10¹⁰M
c. 10⁴M
d. 104M

검증된 단계별 안내
1
Understand that pH is a measure of the hydrogen ion concentration in a solution. The pH scale ranges from 0 to 14, where lower values indicate higher acidity and higher hydrogen ion concentration.
Recall the formula for calculating pH: \( \text{pH} = -\log_{10}[H^+] \), where \([H^+]\) is the hydrogen ion concentration in moles per liter (M).
Given that the pH of the lake is 4.0, use the formula to find the hydrogen ion concentration: \( 4.0 = -\log_{10}[H^+] \).
To solve for \([H^+]\), rearrange the equation: \([H^+] = 10^{-4} \text{ M}\). This is because taking the antilogarithm (inverse of log) of -4 gives \(10^{-4}\).
Compare the calculated hydrogen ion concentration \(10^{-4} \text{ M}\) with the given options to identify the correct answer.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
1m

주요 개념

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

pH Scale

The pH scale is a measure of the acidity or alkalinity of a solution, ranging from 0 to 14. A pH of 7 is neutral, below 7 is acidic, and above 7 is basic. The pH value is the negative logarithm (base 10) of the hydrogen ion concentration, which means a lower pH indicates a higher concentration of hydrogen ions.
추천 영상:
11:05
pH Scale

Hydrogen Ion Concentration

Hydrogen ion concentration refers to the amount of hydrogen ions present in a solution, which determines its acidity. It is expressed in moles per liter (M). The relationship between pH and hydrogen ion concentration is given by the formula: [H+] = 10^(-pH), where [H+] is the concentration of hydrogen ions.
추천 영상:
05:03
Hydrogen Bonding

Logarithmic Calculations

Logarithmic calculations are used to convert between pH and hydrogen ion concentration. Since pH is the negative logarithm of the hydrogen ion concentration, calculating the concentration involves using the inverse operation: [H+] = 10^(-pH). For a pH of 4.0, the hydrogen ion concentration is 10^(-4) M, which is 0.0001 M.
추천 영상:
02:10
Mark & Recapture: Calculations & Assumptions
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