Introduction The purpose of this experiment was to find the identity of the unknown compound #12. This was done both qualitatively and quantitatively. The qualitative observations were used to determine the functional group that was in the unknown‚ the quantitative results were used to determine the molar mass through Duma’s method. The types of compounds that were used in testing were all functional groups‚ Aldehyde‚ Ketone‚ Alcohol and‚ Ester. Functional groups are a portion of a molecule that
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Complexometric Determination of Water Hardness by EDTA Titration Bonnie Abella Dr. Asmita Kane Budruk 2/09/2014 Abstract: the complexometric EDTA titration was used to determine the salt substance in the water. This technique for the unknown sample 154 produced a water hardness of 8.43 x105=mg/L CaCO3 from the collected data which corresponds to the typical value from the city of Tempe. Introduction When the water from the rain collects impurities by dissolving the
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Lauren Richards Unknown Australian Soldier Speech Analysis: The purpose of Prime Minister Paul Keating’s speech ‘Funeral Service of an Unknown Australian Soldier’ was to affirm Australia’s culture and values through reflection on the symbolic power of the sacrifice of the Unknown Australian soldier in World War One. In this patriotic speech he explores the paradox that an ordinary person can achieve the same kind of greatness as the unknown Australian Soldier. He says “It was a lesson about ordinary
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IDENTIFICATION OF UNKNOWN SOLUTIONS USING TLC CHROMATOGRAPHY Purpose: To become familiar with the principles and terminology of TLC chromatography to identify an unknown molecule based on comparisons with known laboratory standards and Rf factors. Background Thin Layer Chromatography: Chromatography is a sophisticated method of separating and identifying mixtures of two or more compounds. The separation is accomplished by the distribution of the mixture between two phases: one that
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sodium bicarbonate (NaHCO3) and sodium carbonate (Na2CO3) with hydrochloric acid (HCl). To start off the mass of two unknown substances (being the sodium bicarbonate and sodium carbonate) will be taken. We will need to construct balanced equations for both of the reactants with the HCl and use this to guide us to figure out how much HCl will be needed to react with each of the unknown substances. When this part is through we will then need to find the percent yield (actual yield/theoretical yield x
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Purpose: a) Determine the melting points of two organic compounds known to have the same melting range when pure. b) Determine the mixture melting point of a mixture of the two pure compounds. c) Identify an unknown organic compound by determining its melting point and mixture melting point. Procedure and Observations: Using the procedure outlined in Appendix A of the Lab Manual‚ approximately equal samples of p-Nitrophenol and acetanilide‚ which are known to have the same melting range
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our first unknown‚ we observed the color and odor of the substance. The substance was a clumpy‚ white‚ crystal-like substance and it smells like new plastic. When we tested the solubility in water it resulted insoluble and in ethanol it resulted soluble. This substance could not be tested for electrical conductivity because the water was insoluble. We then tested for the PH value and it was neutral. The flame test was negative. There was no pigment in the flame. For our second unknown‚ the substance
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DENSITY AND SPECIFIC GRAVITY Materials and Methods Part 1: Density of an Unknown Solid 1. We first were asked from our laboratory instructor to attain an unknown solid and were asked to note down the number of the solid. 2. Determine the mass of the unknown solid to the nearest 0.001 g and record it in the data table in the back of the laboratory workbook. 3. Then we determined the volume of the unknown solid by water displacement. We first filled a 100mL graduated cylinder about
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Abstract Surface tension is defined as the energy or work required to increase the surface area of a liquid due to intermolecular forces. Measuring the surface tension is useful in identifying unknown liquids and to check for its purity. By capillary method‚ the surface tension of a given unknown liquid was obtained. Water was used as reference liquid and both liquids were subjected to capillary method at 20‚ 30 and 40℃. The surface tension of water was used to calculate the radius of the capillary
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J; Green S; Neaum S; Sheppard H; Tallack J; Walker M. (2008). CACHE level 3 Child Care and Education. London: Nelson Thornes. Derby‚ U. o. (unknown‚ unknown unknown). Mulit Professional Approach to EYFS. Retrieved May 21‚ 2014‚ from www.derby.ac.uk: http://www.derby.ac.uk/eyp-futures/a-multi-professional-approach-to-eyfs Education‚ D EYFS. (2007‚ unknown unknown). effective practice and parent partnership. Retrieved May 10‚ 2014‚ from keap.org.uk: http://www.keap.org.uk/documents/eyfs_eff_prac_parent_partner
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