investigate the reaction between bromine and methanoic acid:- Br2 (aq) + HCOOH (aq) ↓ 2Br- (aq) + 2H+ (aq) + CO2 (g) Bromine in aqueous solution is orange-yellow‚ but all the products and the methanoic acid are colourless. The colour gradually fades as the reaction proceeds. In this experiment we wish to determine the order of the reaction with respect to bromine. By using a concentration of methanoic acid which is 10 times greater than that of the bromine we can assume that the
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BROMINATION OF ACETANILIDE OBJECTIVE Aim of the experiment was too brominate acetaldehyde to form p-bromoacetanilide. INTRODUCTION Acetanilide is a chemical compound with the chemical formula of C6H5NH(COCH3). It is a crystalline solid that is prepared by acetylation of analine and is widely used in the dye industry. This crystalline solid is an odourless solid chemical that has a flake or leaf like appearance. It is also known as N phenylacetamide‚ acetanil or acetanilide. Its former
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You are probably wondering what this table of colourful boxes is? Well you’ve come to the right place‚ I hope. What is it? Well everything in the world is made up of elements‚ well almost everything‚ light‚ heat‚ this is energy‚ another story. And elements are a single type of atom‚ the periodic table is basically a table of all know elements to man. What’s in it? To understand what’s in it we need to look at an atom and it subatomic parts. An atom is made up of an Electron(e-) this has a negative
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Title: Diffusion in Gases I Aim: To observe the diffusion of bromine Apparatus and Materials: Glass tube‚ bromine‚ fume chamber Diagram: Procedure: -Liquid bromine was placed in a jar and covered Observations: When first placed in the jar the original color of bromine was red-brown. As it began to diffuse its color changed from dark brown to a lighter brown until it becomes a yellow-like orange color. As it was diffusing liquid bromine changes its state to gaseous. With an odour given off smelling
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product‚ why selective?‚ is this molecule chiral?) Bromine was added to Estilbene to form an anti product. This happened because no true carbocation was formed in reaction. Instead‚ there was an intermediate where one of the bromine atoms was partially bonded to both carbon atoms of the double bond. This prevented bond rotation around the carbon-carbon bond. The steric hindrance prevented the bromine from being added to the same side as the first bromine atom. Thus‚ the process of bromination was stereoselective
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Description The students titrate different oils and fats mixed with Volasil against bromine water. Apparatus and equipment (per group) w White tile w Conical flask w Dropper pipette. (Use the type of teat pipette usually fitted to Universal Indicator bottles‚ that do not allow squirting – eg Griffin.) w Burette (filled with bromine water) w Boss w Clamp w Stand. Chemicals (per group) –3 w Bromine water (Harmful and irritant) 0.02 mol dm (This concentration does not have to be accurate
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Acetylene gas was used for the selective reactivity of hydrocarbons to functional group tests; Bayer’s test‚ Bromine test light‚ Bromine test dark‚ and Tollen’s test. In Bayer’s test‚ only Acetylene‚ Eugenol and Unknown hydrocarbon 2 reacted positively and the rest retain the purplish color of KMnO4. On the other hand‚ the five compounds in Bromine test with light reacted positively. In Bromine test dark‚ Hexane and Unknown hydrocarbon 1 did not react because light (UV) is absent. Lastly‚ in Tollen’s
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required reagent of concentrated sulfuric acid as one of the catalyst and water which allow the mixing known as washing the cyclohexene with water. The formation of product cyclohexene which is reweight and adding of bromine the last reagent for confirming that is alkene known as bromine test which leads to colour changes. Yet this experiment reflects some important discussion and conclusion for the formation of cyclohexene. INTRODUCTION One of the common ways of preparing an alkene is through
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found to determine syn or anti addition of bromines. The melting point was 199-203°C and the NMR J values angle is at 167 which both prove the erythro-2‚3-dibromo-3-phenylpropanoic. Determination of the Stereochemistry of 2‚3-dibromo-3-phenylpropanoic acid. Introduction The purpose of this experiment was to determine the mechanism of the reaction of trans-cinnamic acid with the addition of bromines to 2‚3-dibromo-3-phenylpropanoic acid. An addition of bromine was added to trans-cinnamic acid and it
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contain c-c single bonds‚ are saturated‚ and are the least reactive. Alkenes are c=c double bonds‚ more reactive than alkanes‚ and unsaturated. In the next part of the experiment we added bromine to alkenes. This caused an electrophilic halogenation reaction. If the bromine reacted with the alkene the bromine would discolor from orange and turn clear. Experiment Part A) Solubility of Alkanes: 1 mL of nine solvents (water‚ methanol‚ n-butanol‚ ethylene‚ glycol‚ acetone‚ hexane‚ toluene‚ ethyl
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