Solubility

Studies on chemically deposited Pb(S,Se) thin films J. D. Chaudhari *, R.D. Chaudhari * *, Dr. R. H. Bari + Department of Physics, G. D. M. Arts, K. R. N. Commerce & M. D. Science College, Jamner.Pin – 424 206 Abstract : Thin films of Pb(S,Se) [lead sulfoselenide] have been prepared on glass substrate at 50°C by simple chemical bath deposition technique. The starting materials used for deposition were lead acetate, tri-sodium citrate, sodium sulphite and elemental selenium. Ammonium

Question 1 1.1 In Silica gel chromatograph silica gel is used in chromatography as a stationary phase. In this type of column chromatography, the stationary phase is most often composed of silica gel particles. The silica gel particle sizes can be changed for the achievement of a desired molecular size. Silica gel chromatography separates molecules based on their relative attraction to silica, which is generally greater for more polar molecules than for less polar molecules. Sephadex chromatography

-there are 6 carbon atoms. -there are 6 oxygen atoms. -there are 12 hydrogen atoms. The texture was very hard,and very crystallized. *boiling sugar and water -Very sweet taste (because it is made of sugar). -Rock candy (crystalline sucrose) MELTS at 186 degrees C

Slime is a unique play material composed of a cross-linked polymer. It is classified as a liquid and is typically made by combining polyvinyl alcohol solutions with borate ions in a large mixing container. It often has an unpleasant odor, a green color, and is cold and slimy to the touch. In scientific terms, slime is classified as a non-Newtonian fluid. These are thick liquids that have a variable viscosity. Viscosity is a measurement of the resistance to flow when a shearing force is applied

Within the first part of this lab with creating a 0.500 M solution, it is important and necessary to use deionized water. This is because any other source of water, like tap water, has electrolytes such as fluoride and calcium which will affect the solution because it will not be pure sodium and chlorine ions within the solution. When creating the solution of NaCl, the deionized water must be added to NaCl. This is because if the NaCl was added to the 1.0 L of deionized water, then there is the possibility

PRAT 1: International evidential standards requirements for Alcohol Breath Analyser. In order to design an internationally standard alcohol breath analyser one has to keep in mind the international standards and should produce a design which falls in the minimum requirements required for it internationally. According to the international standards recommendation OIML R 126, there are certain requirements which should be kept in mind while designing an alcohol breath analyser. Metrological and

There are two major types of pigments that are involved in photosynthesis for plants: carotenoids and chlorophylls. Under carotenoids, there are pigments called α and β-carotene and xanthophylls. Chlorophylls include chlorophyll a and chlorophyll b (Pavia et al 208). The main objective of this experiment was to extract these pigments from spinach leaves using chromatography techniques. First, the pigment was extracted from the leaves by column chromatography. However, the column was packed with granular

We are testing for the presence of lipids, the amount and how polar they are. The bigger the dot, the higher the concentration and the farther the dot the more nonpolar it is. A positive test for lipid chromatography appears to have phospholipids, fatty acids and triglycerides in that order on the powdered strip while a negative test appears to not have those three in that order or even have all those three show up. We tested chromatography solvent and placed it on the silica gel strip. Our hypothesis

In our seventh Grade science Class we were asked to find a project to do for Science Fair. My partner and I chose to pick a topic about evaporation, We picked how fast different liquids would evaporate. One thing That might be a set back to this project is that it is all based on time and the weather.We will be measuring five different types of liquids and gasses, Which are two different brands of water, alcohol, Vinegar , and gasoline. We are estimating that this project will take anywhere from

Methods: Before being able to find the unknown ions inside the solution provided by the teacher, the ions needed to be examined for any physical or chemical changes to ensure the confirmation of each one. There were three separate sections to this lab, each one containing the same fifteen steps that needed to be followed to identify every ion. In the first part, the ions were given labeled in their original containers and divided into separate test tubes. Each ion was tested with the steps leading