phase. In the case of TLC the stationary phase is the silica gel on the TLC tray. Procedure Chromatograph method is a method of separating mixtures of two or more compounds. Two phases are important in this method; one that is stationary and one that is moving. Chromatography works on the principle that different compounds will have different solubilities and adsorption to the two different phases between which are to be partitioned. Thin Layer Chromatography (TLC) is a solid-liquid technique
Free Chromatography Thin layer chromatography
C H A P T E R I The ways in which new words are formed‚ and the factors which govern their acceptance into the language‚ are generally taken very much for granted by the average speaker. To understand a word‚ it is not necessary to know how it is constructed‚ whether it is simple or complex‚ that is‚ whether or not it can be broken down into two or more constituents. We are able to use a word which is new to us when we find out what object or notion it denotes. Some words‚ of course‚ are more
Premium Affix Prefix
Result of Observation Chemical name and symbol Physical appearance Cation of the compound Flame color NaNO3Sodium nitrate Colourless crystal Na+ Yellowish Orange NaClSodium chloride Colorless crystal Cl+ Yellowish Orange LiNO3Lithium nitrate Colorless crystal Li+ Red BaNO3Barium nitrate White crystal Ba² Bright yellow‚ lime yellow Sr(NO3) 2Strontium nitrate White crystal Sr² Dark red Cu(NO3)2Cupric nitrate Blue crystal Cu² Green‚ bluish green. Ca(NO3) 2Calcium nitrate White crystal Ca² Redish
Premium
111 – Lab #2 Formula and Composition of a hydrate Purpose of the Experiment: The purpose of this experiment is to provide an opportunity to practice proper heating and cooling techniques and to calculate the formula of a known anhydrous compound and to calculate the percent of water in an unknown hydrate from results. Materials and Methods: Materials used for this experiment included 3 crucibles (with lids)‚ clay triangle‚ ring‚ burner‚ CaSO4.2H2O and one unknown hydrate. In Part
Premium Mass Heat The Crucible
Secondary Alcohol( ketones Tertiary( none Phenols Reaction with bromine/water (Confirms if phenol compound) Reagent: bromine in H2O Observation: Disappearance of orange-brown bromine color‚ then formation of white precipitate Procedure: 3 drops phenol soln on test tube+ Br in H2O drop by drop while shaking‚ observe formation of ppt Oxidation by KMnO4 (Confirms if phenol compound) Reagent: aqueous neutral KMnO4 Observation: purple color( brown color (formation of quinone) Procedure:
Premium Carboxylic acid Alcohol Amine
shows us the specific spots (large number drops) have a little change in temperature.it means that a compound has been distilled off and it shows on the horizontal line. On the vertical line of the graph shows us the temperature change with no drops‚ it means that the transition between the two compounds boiling points. From the two graph‚ the horizontal line indicate the boiling point of two compounds and vertical lines indicate the transition between the boiling point‚ we can see the fractional curve
Premium Distillation Boiling point
substances. The processes of separation will be determined by the physical and chemical properties of the substances. In order to use the Earth’s resources effectively and efficiently‚ it is necessary to understand the properties of the elements and compounds found in mixtures that make up earth materials. Applying appropriate models‚ theories and laws of chemistry to the range of earth materials allows a useful classification of the materials and a better understanding of the properties of substances
Free Atom Chemical bond Oxygen
Organic chemistry studies carbon compounds‚ but a few carbon compounds such as carbon monoxide‚ carbon dioxide‚ metal carbonates‚ and carbon disulphide traditionally come under the umbrella of inorganic chemistry. INTRODUCTORY 1. Give the following for the compound propane C3H8: (a) Full structural formula (b) Skeletal formula 2. Draw all the possible isomers of hexane C6H14 and give the name of each. 3. Draw the structural formulae for each of the following alkanes: (a) 2‚2- dimethylbutane
Premium Alcohol Carboxylic acid Organic chemistry
thin-layer chromatography or TLC. Introduction and Background: TLC is a quick and convenient chromatographic method for analyzing a mixture by separating its constituent compounds. Along with determining the number of components in a mixture‚ TLC can also be of aid in identifying unknown compounds. Separation of compounds is achieved as a partitioning occurs between a mobile phase and a stationary phase. In TLC‚ the stationary phase is composed of a thin layer of the highly polar silica gel that
Premium
distinguish polar and non-polar solvents. ii. To familiar with the analysis technique by using the thin layer chromatography. iii. To differentiate the retention factor‚ Rf for different compounds. [pic] Result: |Compound |Distance traveled by the compound | |o-nitroanaline |2.45 | |p-nitroaniline
Premium Thin layer chromatography Chromatography Solvent