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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 59
16장, 문제 59

What mass of HI must be present in 0.250 L of solution to obtain a solution with each pH value?
a. pH = 1.25 b. pH = 1.75 c. pH = 2.85

검증된 단계별 안내
1
Determine the concentration of hydrogen ions [H^+] in the solution using the pH value. Use the formula: [H^+] = 10^{-pH}.
Substitute the given pH value (1.75) into the formula to find [H^+].
Recognize that HI is a strong acid and dissociates completely in water, so the concentration of HI is equal to the concentration of [H^+].
Calculate the moles of HI required using the concentration of HI and the volume of the solution (0.250 L). Use the formula: moles of HI = [HI] * volume.
Convert the moles of HI to mass using the molar mass of HI. Use the formula: mass = moles * molar mass of HI.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
3m

주요 개념

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

pH and Hydrogen Ion Concentration

pH is a measure of the acidity or basicity of a solution, defined as the negative logarithm of the hydrogen ion concentration. A lower pH indicates a higher concentration of hydrogen ions (H+), while a higher pH indicates a lower concentration. For example, a pH of 1.75 corresponds to a hydrogen ion concentration of approximately 0.0178 M.
추천 영상:
가이드 코스
06:25
Hydronium Ion Concentration Example

Molarity and Solution Concentration

Molarity (M) is a way to express the concentration of a solution, defined as the number of moles of solute per liter of solution. To find the mass of a solute needed to achieve a specific molarity, one can use the formula: mass = molarity × volume × molar mass. This concept is essential for calculating how much HI is required to reach the desired pH.
추천 영상:
가이드 코스
00:53
Molarity Concept

Dissociation of HI in Solution

Hydrogen iodide (HI) is a strong acid that completely dissociates in water to produce hydrogen ions (H+) and iodide ions (I-). This complete dissociation means that the concentration of H+ ions in the solution is equal to the concentration of HI initially added. Understanding this dissociation is crucial for determining the amount of HI needed to achieve a specific pH.
추천 영상:
가이드 코스
01:39
Solution Components
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