이온 강도(ionic strength effect)

목차

1. Objectives & Backgrounds
2. Materials
3. Calculation
4. Procedures
5. Results
6. Discussion
7. Reference

본문내용

1) Common ion effect
- A salt is less soluble if one of its ions is already present in the solution.
2) Ionic strength effect
- Addition of an "inert" salt increases the solubility of an ionic compound
- ionic atmosphere : For the average anion, there will be more cations than anions near it because cations are attracted to the anion, but anions are repelled. These interactions create a region of net positive charge around any particular anion. this region is the ionic atmosphere.
- The greater the ionic strength of a solution, the higher the charge in the ionic atmosphere. Each ion-plus-atmosphere contains less net charge and there is less attraction between any particular cation and anion. Increasing ionic strength promotes dissociation into ions.

<중 략>

- Solution C는 반응이 화학적으로 평형한 상태로 일정한 색을 유지하고 있다. b beaker는 색을 비교하기 위한 대조군으로 아무것도 가하지 않은 것이다. 또 solution A를 만들 때 강산인 를 가하는 것은 이온이 용액 속의 다른 물질과 반응해서 침전하는 것을 방지하기 위한 것이다.

참고 자료

분석화학 (제7판, Daniel C. Harris)
Quantitative Chemical Analysis (Seventh Edition, Daniel C. Harris)
대학화학 (제6판, Zumdahl)