Ocr b salters chemistry Study guides, Class notes & Summaries

OCR AS Level Chemistry B (Salters) H033/01 Foundations of chemistry Question paper And Mark Scheme merged for June 2023

OCR Salters B Chemistry- Paper 3 Practical Skills 2024

OCR AS Level Chemistry B (Salters) H033/02 Chemistry in depth Question paper And Mark Scheme for June 2023

OCR A LEVEL CHEMISTRY B (SALTERS) H433/01 FUNDAMENTALS OF CHEMISTRY 2024 ACTUAL EXAM WITH 100% CORRECT ANSWERS. CHECK THE LAST PAGE FOR ANSWERS. 1 Which feature of the structure of the atom was deduced from the Geiger and Marsden experiment? A Atoms consist of electrons, protons and neutrons. B The nucleus is small and dense. C Electrons exist in energy levels/shells. D Electrons exist in atomic orbitals. Your answer [1] 2 Which row gives the correct trends for the followi...

Weighing a solid correct answers1. Zero the balance 2. Place weighing bottle/boat onto balance and add in the approximate required mass of solid 3. Accurately weigh solid and weighing bottle and record 4. Empty solid into glassware where it will be used 5. Accurately reweigh empty weighing bottle 6. Subtract recorded mass for empty weighing bottle from mass recorded for solid and weighing bottle Measuring a volume of a liquid using a pipette correct answersPipettes used for ac...

History of the atom correct answersSolid sphere Johnson - Plum pudding (-ve electrons) Rutherford - fired alpha particles at thin gold sheet, a few were deflected backwards - tiny +ve nucleus, surrounded by cloud of -ve electrons Electrons in shells/ energy levels Percentage yield equation correct answersactual yield/theoretical yield x 100 Making new concentrations equation correct answersvol to use = final conc/initial conc x vol required Acid-alkali titrations correct answersUse p...

History of the atom correct answersSolid sphere Johnson - Plum pudding (-ve electrons) Rutherford - fired alpha particles at thin gold sheet, a few were deflected backwards - tiny +ve nucleus, surrounded by cloud of -ve electrons Electrons in shells/ energy levels Percentage yield equation correct answersactual yield/theoretical yield x 100 Making new concentrations equation correct answersvol to use = final conc/initial conc x vol required Acid-alkali titrations correct answersUse p...