Bromobutane - Study guides, Class notes & Summaries

AQA A-LEVEL CHEMISTRY 7405/2 PAPER 2 MARK SCHEME A-level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2020 Version: 1.0 Final *206A7405/2/MS* Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all a...

AQA A-LEVEL CHEMISTRY 7405/2 PAPER 2 MARK SCHEME A-level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme Version: 1.0 Final *6A7405/2/MS* Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates p...

3.2 Marking procedure for calculations Full marks should be awarded for a correct numerical answer, without any working shown, unless the question states ‘Show your working’ or ‘justify your answer’. In thiscase, the mark scheme will clearly indicate what is required to gain full credit. If an answer to a calculation is incorrect and working is shown, process mark(s) can usually be gained by correct substitution / working and this is shown in the ‘Comments’column or by each stage o...

Experiment 5 Report Scaffold The purpose of the experiment is to determine and understand how different reaction conditions produce different product distributions through the use of Gas Chromatogra phy analysis. The dehydration of 1-butanol and 2-butanol in the presence of a strong acid and the debromination of 1-bromobutane and 2-bromobutane with a strong base leads to the formation of butene isomers, trans-2-butene, cis-2-butene, and 1-butene. An elimination reaction is a type of organic reac...

2 Organic structures Where students are asked to draw organic structures, unless a specific type is required in the question and stated in the mark scheme, these may be given as displayed, structural or skeletal formulas or a combination of all three as long as the result is unambiguous. In general • Displayed formulae must show all of the bonds and all of the atoms in the molecule, but need not show correct bond angles. • Skeletal formulae must show carbon atoms by an angle or suitable inte...

MARK SCHEME – AS CHEMISTRY – 7404/1 – JUNE 2021 10  In most cases, the use of “sticks” to represent C ─ H bonds in a structure should not be penalised. The exceptions to this when “sticks” will be penalised include  structures in mechanisms where the C ─ H bond is essential (eg elimination reactions in halogenoalkanes and alcohols)  when a displayed formula is required  when a skeletal structure is required or has been drawn by the candidate 3.13 Organic names...

subsequent equation or observation) can be scored from an incorrect attempt (possibly an incomplete reagent) at the correct reagent. Specific details will be given in mark schemes. For example, no credit would be given for  the cyanide ion or CN– when the reagent should be potassium cyanide or KCN;  the hydroxide ion or OH– when the reagent should be sodium hydroxide or NaOH; MARK SCHEME – A-LEVEL CHEMISTRY – 7405/2 – JUNE 2021 6  the Ag(NH3)2+ ion when the reagent shoul...

Dehydration of 1- and 2-Butanol and Dehydrobromination of 1- and 2-Bromobutane: Analysis of Gaseous Products by Gas Chromatography​1 REACTIONS:​ Elimination TECHNIQUES:​ Gas Chromatography In this experiment, we will compare and contrast eliminations under acidic and basic conditions. We will conduct the acid-catalyzed dehydration of a primary and a secondary alcohol. We will also conduct the base-induced dehydrobromination of the isomeric halides. The stereo- and regio-chemistry the four ...

1. General The mark scheme for each question shows: • the marks available for each part of the question • the total marks available for the question • the typical answer or answers which are expected • extra information to help the examiner make his or her judgement and help to delineate what is acceptable or not worthy of credit or, in discursive answers, to give an overview of the area in which a mark or marks may be awarded. The extra information in the ‘Comments’ column is aligne...

AQA A-level CHEMISTRY 7405/3 Paper 3 Mark scheme June 2022 Version: 1.0 Final. MARK SCHEME – A-LEVEL CHEMISTRY – 7405/3 Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination. The standardisation process ensures that the mark schem...