Dichromate Study guides, Revision notes & Summaries

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...

Ammonium NH4+ Hydronium H30+ Mercury (I) Hg2(2+) Acetate C2H3O2(-) Azide N3(-) Carbonate CO3(2-) Chlorate ClO3(-) Chlorite ClO2(-) Chromate CrO4(2-) Cyanide CN(-) dichromate Cr2O7(2-) dihydrogen phosphate H2PO4(-) Hydrogen carbonate (bicarbonate) HCO3(-) hydrogen phosphate HPO4(2-) hydrogen sulfate (bisulfate) HSO4(-) Hydroxide OH(-) Hypochlorite ClO(-) Nitrate ...

Histotechnology: A Self-Instructional Text, 4th edFor adequate fixation, the fixative volume should be at least ____ times greater than the tissue volume. A. Equal B. 5-10 C. 10-14 D. 15-20 - correct answers 15-20 This type of microscope is used for the identification of crystals as well as to make identification of amyloid A. Light microscope B. Polarizing microscope C. Phase-contrast microscope D. Darkfield microscope - correct answers Polarizing microscope For most routine H & E...

BOD (biological oxygen demand)measure of how quickly bio-organisms consume oxygen in a water sample COD (chemical oxygen demand)faster way to measure oxygen demand in a sample; indirectly measure amount of bio-matter in the water sample Dichromate ion dissolved in sulfuric acid Percent of Earth's water than is seawater97% Amount freshwater trapped in glaciers3/4ths Groundwaterwater located beneath the Earth's surface (often more than 1 km down)

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...

POLYATOMIC IONS Di Pasquo Questions with comlete solution 2023 NO₃⁻ - correct answer nitrate NO₂⁻ - correct answer nitrite CrO₄²⁻ - correct answer chromate Cr₂O₇²⁻ - correct answer dichromate CN⁻ - correct answer cyanide

ammonium correct answers NH₄⁺ acetate correct answers C₂H₃O₂⁻ carbonate correct answers CO₃²⁻ hydrogen carbonate (bicarbonate) correct answers HCO₃⁻ dichromate correct answers Cr₂O₇²⁻ chromate correct answers CrO₄²⁻ perchlorate correct answers ClO₄⁻ chlorate correct answers ClO₃⁻ chlorite correct answers ClO₂⁻ hypochlorite correct answers ClO⁻ cyanide correct answers CN⁻ hydroxide correct answers OH⁻ nitrate c...

This resource includes exam questions from both Chemistry A and Chemistry B. It is not designed as a topic test but is instead intended as a document to support the teaching and learning of Module 1 – Development of practical skills in chemistry. 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...

Elements of Art - Shape, color, form, texture, space, line, and value (Sam Couldn't Find The Small Lily Vase) Principles of design - Emphasis, unity, contrast, rhythm, balance, pattern, and movement (Elephants Unfortunately Can't Rap, But Pigs Might) Elements and principles: 2D vs. 3D - 2D: Implied texture, space refers to composition 3D: Real texture, space refers to how the artist uses the space in 3D, form describes the shape of the artwork (width, depth, and height) Texture - C...

Chem 1311 Study Questions with Correct Answers Ammonium - Answer-NH₄⁺ Hydronium - Answer-H₃O⁺ Mercury(I) - Answer-Hg₂²⁺ Acetate - Answer-C₂H₃O₂⁻ Azide - Answer-N₃⁻ Carbonate - Answer-CO₃²⁻ Chlorate - Answer-ClO₃⁻ Chlorite - Answer-ClO₂⁻ Chromate - Answer-CrO₄²⁻ Cyanide - Answer-CN⁻ Dichromate - Answer-Cr₂O₇²⁻ Dihydrogen Phosphate - Answer-H₂PO₄⁻ hydrogen carbonate (bicarbonate) - Answer-HCO₃⁻ ...