Ocr a level chemistr Study guides, Class notes & Summaries

OCR A Level Chemistry Paper 1 (H432/01) Periodic table, Elements and physical chemistry Mark Scheme June 2023. FIRST CHECK THE ANSWER ON ANSWER LINE If answer = –1872 award 2 marks ----------------------------------------------------------------- H lattice = 2(+ 296) – 965 – 503 – 180 + 2(–107)– 602 H lattice = –1872 (kJ mol–1 ) 2 AO2.2 2 ALLOW for 1 mark +1872 (wrong sign on answer) Common errors for 1 mark –3056 (–296 x 2 instead of 296 x2) –2168 (2...

OCR A Level Chemistry Paper 3 2023 (H432/03 Unified chemistry) Mark Scheme June 2023 | VERIFIED. Rubidium chlorate(VII) 1 AO1.1 ALLOW Rubidium(I) chlorate(VII) Rubidium chloroate(VII) IGNORE Rubidium (VII)chlorate Rubidium chlorate(IIV) Rubidium chlorate (7) Rubidium perchlorate (ii) FIRST CHECK THE ANSWER ON ANSWER LINE If answer = 54.0 OR 54.1 OR 54.2 (kJ mol–1 ) award 3 marks --------------------------------------------------------------------------------- Energy change from mcΔ...

OCR A Level Chemistry Paper 3 2023 (H432/03 Unified chemistry) Mark Scheme June 2023. O 1 AO2.1 ALLOW S BOD (c) P OR S 1 AO1.1 ALLOW S8, P4 ALLOW As, Se (d) Cr Mn 2 AO1.2 IGNORE ions (e) Si 1 AO1.1 (f) S 1 AO2.1 ALLOW SF6 (g) F 1 AO1.1 (h) As 1 AO2.2 H432/03 Mark Scheme June 2023 10 Question Answer Marks AO element Guidance 2 (a) (i) Rubidium chlorate(VII) 1 AO1.1 ALLOW Rubidium(I) chlorate(VII) Rubidium chloroate(VII) IGNORE Rubidium (VII)chlorate Rubidium chlorate(I...

OCR A Level Chemistry Paper 3 2023 (H432/03 Unified chemistry) Mark Scheme June 2023. ALLOW upper case when it is obvious, e.g. ALLOW CR for Cr, AS for As ALLOW names for elements (a) THREE from: N O F H 1 AO1.1 DO NOT ALLOW ANY OTHER ELEMENTS (CON) (b) O 1 AO2.1 ALLOW S BOD (c) P OR S 1 AO1.1 ALLOW S8, P4 ALLOW As, Se (d) Cr Mn 2 AO1.2 IGNORE ions (e) Si 1 AO1.1 (f) S 1 AO2.1 ALLOW SF6 (g) F 1 AO1.1 (h) As 1 AO2.2 H432/03 Mark Scheme June 2023 10 Question Answer Marks ...

Ocr a level Chemistry Paper 3 H432/03 Unified chemistry June 2023 Mark Scheme

OCR A Level Chemistry B (Salters) H433/01 Fundamentals of Chemistry June 2023 Question Paper

OCR A Level Chemistry Paper 1 (H432/01) Periodic table, Elements and physical chemistry Mark Scheme June 2023. FIRST CHECK THE ANSWER ON ANSWER LINE If answer = –1872 award 2 marks ----------------------------------------------------------------- H lattice = 2(+ 296) – 965 – 503 – 180 + 2(–107)– 602 H lattice = –1872 (kJ mol–1 ) 2 AO2.2 2 ALLOW for 1 mark +1872 (wrong sign on answer) Common errors for 1 mark –3056 (–296 x 2 instead of 296 x2) –2168 (2...

Ocr A Level Chemistry Paper 3: H432/03 Unified chemistry question paper June 2023

OCR A Level Chemistry B (Salters) H433/02 Scientific literacy in chemistry June 2023 Questiion Paper