Ocr b a level chemistry Study guides, Revision notes & Summaries

OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 2: Acid-base titration Exam Questions and Mark SchemeThe equation for the reaction of aqueous phosphoric(V) acid, H3PO4, with aqueous sodium hydroxide, NaOH(aq) is shown below. H3PO4(aq) + 3NaOH(aq) → Na3PO4(aq) + 3H2O(l) 25.0 cm3 of a 0.200 mol dm−3 H3PO4(aq) is titrated with 0.600 mol dm−3 NaOH(aq). Which statement is correct? A. The end point occurs when 25.00 cm3 of NaOH(aq) has been added. B. The end point occurs when 75.00 c...

OCR A Level Chemistry A (H432) Chemistry B (H433) PAG 5: Synthesis of an organic liquid Practice Exam Questions and Mark Scheme 1. Ethanol is oxidised to ethanoic acid using acidified potassium dichromate(IV) solution. The reaction is heated under reflux using the equipment shown in the diagram below. What is the reason for heating under reflux? A. to ensure even heating B. to prevent any substances escaping C. to boil the mixture at a higher temperature D. to allow efficient mixing Yo...

ocr A Level Chemistry B H433-01 MARK SCHEME June2023.

OCR A LEVEL CHEMISTRY B PAPER 3 MARKSCHEME

ocr A Level Chemistry B (Salters) H433-02 QUESTION PAPER June2023.

ocr A Level Chemistry B (Salters) (H433-02) June 2022 Question Paper

GCE Chemistry B H033/02: Chemistry in depth AS Level Mark Scheme for June 2022 /OCR AS LEVEL JUNE 2022 MARKSHEME CHEMISTRY B PAPER 2 CHEMISTRY IN DEPTH S - The Marketplace to Buy and Sell your Study Material GCE Chemistry B H033/02: Chemistry in depth AS Level Mark Scheme for June 2022 Oxford Cambridge and RSA Examinations Downloaded by: NorthWes...

1 Catalytic cracking of hydrocarbons is carried out in the petrochemical industry. Hot vaporised hydrocarbons and a powdered catalyst are fed into the bottom of a tube and forced upwards by steam. (a) (i) Decane, C10H22, can be cracked to give an alkene with four carbon atoms and another alkane. Write a chemical equation for this reaction using molecular formulae. [1] (ii) 2,2,3-Trimethylheptane is an isomer of decane. Draw the skeletal formula of 2,2,3-trimethylheptane. ...

OCR AS LEVEL CHEMISTRY A H032/02 JUNE 2022 FINAL MARK SCHEME - Depth in chemistry. H032/02 Mark Scheme 6 11. Annotations available in RM Assessor Annotation Meaning Correct response Incorrect response Omission mark Benefit of doubt given Contradiction Rounding error Error in number of significant figures Error carried forward Level 1 Level 2 Level 3 Benefit of doubt not given Noted but no credit given Ignore Blank page H032/02 Mark Scheme 7 12. Abbreviations, annotations a...

GCE Chemistry B H033/02: Chemistry in depth AS Level Mark Scheme for June 2022 Oxford Cambridge and RSA Examinations Downloaded by: NorthWest | Distribution of this document is illegal OCR (Oxford Cambridge and RSA) is a leading UK awarding body, providing a wide range of qualifications to meet the needs of candidates of all ages and abilities. OCR qualifications include AS/A Levels, Dipl...