Ethanoate - Study guides, Class notes & Summaries

Acid-Base Equilibria Bronsted-Lowry theory of an acid? - correct answer An acid is a substance which can donate a proton (H+) to a base. Bronsted-Lowry theory of a base? - correct answer A base is a substance which can accept a proton (H+) from an acid. (N.B. All bases must have at least one pair of electrons to be able to accept a proton. T/F: When an acid loses a proton to a base, it forms a base itself. - correct answer True. Similarly, when a base accepts a proton from an acid, it for...

Aims of the experimentTo investigate the purity of ethyl-ethanoate produced in the laboratory.To make comparison between company/industrial and laboratory manufacture of ethylethanoate to the industrial production.To make analysis

AQA A-level CHEMISTRY 7405/3 Paper 3 Version: 1.0 Final *JUN* IB/M/Jun23/E9 7405/3 For Examiner’s Use Question Mark 1 2 3 4 5 6 Section B TOTAL Friday 23 June 2023 Morning Time allowed: 2 hours Materials For this paper you must have: • the Periodic Table/Data Booklet, provided as an insert (enclosed) • a ruler with millimetre measurements • a scientific calculator, which you are expected to use where appropriate. Instructions • Use black ink or black ball-poin...

Unit 4: Esters. How do we draw and name ester? In order to work out the structure of the ester formed when an alcohol and a carboxylic acid react together we start by drawing them separately so that their OH groups are next to each other Then we remove the H and the OH to form water and join what's left For example: H H | | H - C - C - O - H ETHANOL | | H H and H O | || H - C - C ETHANOIC ACID | H O - H Then the H breaks off the ethanol which becomes ethyl and the OH bre...

PREPARATION AND NAMING OF ESTERS FROM CARBOXYLIC ACIDS. Esters are produced when carboxylic acids are heated with alcohols in the presence of an acid catalyst. The catalyst is usually concentrated sulphuric acid. Dry hydrogen chloride gas is used in some cases, but these tend to involve aromatic esters (ones where the carboxylic acid contains a benzene ring). The esterification reaction is both slow and reversible. The equation for the reaction between an acid RCOOH and an alcohol R'OH (wh...

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Industrial method Ethyl ethanoate is made by esterification. A mixture of sulfuric acid, acetic acid and ethanol are heated and poured into an esterifying column. The mixture that evaporates first goes into a second column. 85% of ethyl acetate is separated. After distillation occurs, water is added. There are now two layers. The top layer is poured into a refluxing column. The residue left, is then distilled and removed of any impurities

TOF steps - CORRECT ANSWER-1) ionisation 2) acceleration 3) ion drift 4) detection 5) analysis Electron impact - CORRECT ANSWER-Sample vaporised and electron gun fires high energy electrons at it which knock off 1 electron from each particle, making them 1+ ions NB- can knock off more than one e or break molecular ion electrospray ionization - CORRECT ANSWER-Sample dissolved in volatile solvent then injected through needle to give fine mist which is attached to positive end of high v...

DAT Test Bank Questions with Answers 100% correct | 2024 update DAT Test Bank Questions with Answers 100% correct | 2024 update Contains marking scheme Survey of Natural Sciences Which of the following viral genomes can be directly translated into protein by the host cell’s translation machinery? Double-stranded DNA Single-stranded DNA, coding (+) strand Double-stranded RNA Single-stranded RNA, coding (+) strand Single-stranded RNA, template (–) strand ...