1 / 8

Analytical Chemistry

Analytical Chemistry Analytical Chemistry : The branch of chemistry that deals with the separation, identification and determination of components in a sample. It also traditionally includes coverage of chemical equilibrium and statistical treatment of data. Qualitative analysis

valeriee
Download Presentation

Analytical Chemistry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Analytical Chemistry • Analytical Chemistry: The branch of chemistry that deals with the separation, identification and determination of components in a sample. • It also traditionally includes coverage of chemical equilibrium and statistical treatment of data. • Qualitative analysis • Quantitative analysis

  2. 1- Qualitative analysis • Attempting to identify what materials are present in sample.

  3. 2- Quantitative analysis • Determining how much of material is present in a sample. The most reaction which is used in qualitative analysis can be used as a principle for quantitative analysis with some changes. • The most important thing in quantitative analysis was purity…… • Always qualitative analysis must be done before quantitative analysis…. • Weight • Volume

  4. Chemical Methods This method depends on making a chemical reaction for the analyte and this reaction must be having some conditions. 1-Spontaneous and fast reaction 2- Irreversible reaction, and completely reacted 3- Equilibrated reaction 4- No side reaction 5- Clear equivalent point 6- Using indicators for measuring the equivalence point

  5. Solutions • Solutions are homogeneous mixtures. • The major component is called solvent, and the minor components are called solute. • If both components in a solution are 50%, the term solute can be assigned to either component. • When gas or solid material dissolve in a liquid, the gas or solid material is called the solute. • When two liquids dissolve in each other, the major component is called the solvent and the minor component is called the solute.

  6. Gravimetric Analysis • By definition, includes all methods of analysis in which the final stage of the analysis involves weighing. *. Volumetric Analysis • Volumetric analysis involves using volumes of liquids to analyse a concentration. To do this we need the following things: • A chemical of a known concentration that will react with our ‘unknown’ concentration chemical • An indicator that will tell us when all the chemical has been reacted • A number of pieces of equipment that we can use to measure volume accurately

  7. Concentration expression 1- Molarity: Number of moles in one liter of solution, expressed as M. • M = (No. of mole of solute) / (volume of solvent by liter (l )). or M = (No. of mmole solute) / (volume of solvent by milliliter(ml)) M = (No. of moles) / (liter of solution) = [(gram of solute) / (M.wt.) / liter of solution]. M= [(mg of solute) / [(milliliter of solution) x M.wt.] These two equations are very important in analytical chemistry especially in preparation of solutions………….

More Related