products have become safer and less harmful to our environment and ourselves. Materials Various indicators ● Bro blue ● Phe red ● Met red ● Methyl blue ● Met orange ● Methyl yellow Various unknowns Watch trays Procedures 1. Take 6 indicators that are all different colors. 2. Take the 4 unknowns numbered 14 3. Take a watch tray and wash it down before using it. 4. Put the indicator that is numbered 1in 6 slots on the watch tray. (Only put in one drop) 5. Take each indicator and put it in 1 slot each
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the Unknown substances are bases or acids. Materials: goggles aprons paper for data table graduated cylinder unknown I substance beakers/test tubes stirring rod litmus paper pH indicator paper pH color chart phenolphthalein scoopula eye-dropper digital pH meter magnesium ribbon calculator unknown II substance forceps sodium bicarbonate Procedures: Test the pH of the Unknown substances with litmus paper and pH indicator paper and match to color chart Test the Unknowns with
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Abstract Chemically active extraction was used to separate two unknown compounds from each other and to determine what compound class each compound belongs. The solid unknown was purified by recrystallization and its melting point range was determined to be 109-111°C. The liquid unknown was purified by simple distillation and its boiling point was determined to be 95°C. An IR spectrum was collected for each of the purified compounds; the solid was determined to be 3-toluic acid and the liquid was
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is to find out the density of the unknown solid object by determining the mass and the volume through the experiment. To do this we will be get the mass of the object and determine the volume of the object by placing it into a liquid. Then we will divide mass by volume and get its density. PROCEDURE: 1) Obtain a solid metal 2) Weigh the dry sample carefully to the nearest 0.0001 grams on the top loading balance. 3) Determine the volume of your unknown solid sample by liquid displacement
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molecular formula were given for 3 unknowns. An effort was made to conclusively identify these unknown samples using only the spectroscopy data‚ specifically 1H-NMR‚ 13C-NMR‚ and IR spectroscopy. Although mass spectrometry was given for the samples as well‚ its use was suggested only for confirmation‚ not identification‚ of the unknowns. Mass spectrometry was not included in the identification analysis of the compounds‚ however was used for confirmation of unknown #46. The spectroscopic data was
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Method’’ Lab Report by Mitchell Eaton Biological Science Lab (BIOL 1001-029) February 24th‚ 2015 ABSTRACT: Purpose Statement: HYPOTHESES: Unknown Substance One: Unknown Substance Two: Unknown Substance Three: Unknown Substance Four: Unknown Substance Five: Unknown Substance Six: PROCEDURES: Materials Student Provides: Distilled Water 2 Clean Sheets of Paper 1 Paper Towel 1 Pair of Scissors LabPaq Provides: 1
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Identification and Separation of Dyes by TLC Pre-lab Properties: Ethyl acetate‚ ethanol‚ silica‚ azobenzene‚ azulene‚ 4-(p-nitrophenylazo) resorcinol‚ methyl red‚ bromocresol green (solubilities in water and ethanol) Purpose: To identify compounds from an unknown mixture using TLC Up to 100% of missed points can be recovered from this lab Watch the video: http://www.youtube.com/watch?v=e99nsCAsJrw (MIT) TLC plates are near the main hood DO NOT BREAK CAPILLARY TUBES Keep spots small and concentrated (video)
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STA1101 Normal Distribution and Continuous random variables CONTINUOUS RANDOM VARIABLES A random variable whose values are not countable is called a _CONTINUOUS RANDOM VARIABLE._ THE NORMAL DISTRIBUTION The _NORMAL PROBABILITY DISTRIBUTION_ is given by a bell-shaped(symmetric) curve. THE STANDARD NORMAL DISTRIBUTION The normal distribution with and is called the _STANDARD NORMAL DISTRIBUTION._ Example 1: Find the area under the standard normal curve between z = 0 and z = 1.95 from z
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2004 Lab Report 1 Introduction The purpose of this project is to identify an unknown organic acid (X) by conducting various experiments to determine the acid’s unique properties. By determining selected constant properties of the unknown and then comparing these properties to the constant properties of known substances‚ it is possible to identify an unknown substance. The properties used to identify the unknown must be intensive‚ or independent of amount. Both chemical properties and physical
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conducted to determine the identity of an unknown aldehyde or ketone. The tests include a Tollens test‚ a Schiff test‚ an iodoform test‚ and a derivative melting point test. The data of the first three tests was inconclusive. The final derivative melting point test was utilized to successfully determine that the unknown was the ketone‚ Propiophenone. Introduction: Qualitative analysis is a method or series of methods used to determine the identity of an unknown compound (1). It is imperative that
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