H433 - Study guides, Class notes & Summaries

ocr A Level Chemistry B (Salters) (H433-01) Question Paper June2024.

ocr A Level Chemistry B (Salters) (H433-03) Question Paper June2024

ocr A Level Chemistry B (Salters) Paper 1 Question Paper June2023 H433/01 Fundamentals of Chemistry

OCR A Level Chemistry A (H432) Chemistry B (H433)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 Your answer [1] 2. A chemist compares the rates of hydrolysis of 1-chloropropane and ...

ocr A Level Chemistry B H433-02 Mark Scheme June2023.

OCR 2024 A Level Chemistry B (Salters) H433/02 Scientific literacy in chemistry Question Paper & Mark Scheme (Merged)

OCR 2024 A Level Chemistry B (Salters) H433/01 Fundamentals of Chemistry Question Paper & Mark Scheme (Merged)

OCR 2024 A Level Chemistry B (Salters) H433/03 Practical skills in chemistry Question Paper & Mark Scheme (Merged)

2024 OCR A Level Chemistry B (Salters) H433/03 Practical skills in chemistry Actual Mark Scheme and Question Paper Combined

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...