Fractional distillation Study guides, Class notes & Summaries

Recapitalization a technique used to purify organic solid compounds with the goal to dissolve and subsequently crystallize a pure substance from the solution. What are the four characteristics of a good solvent? -Target must be soluble in high temp with impurities soluble at room temp or at high temps -Must be chemically inert (non-reactive) -Low boiling point, or highly volatile What are the 5 basic steps to Recrystallization -Choose suitable solvent -Dissolve the impure mixture in the...

10 - LCAs, water with complete solutions What does the life cycle assessment (LCA) of product do? - correct answer Assesses the environmental impact of a product during each stage of its production process What is the process of the production of a product? - correct answer 1. Getting raw materials 2. Manufacture and packaging 3. Using the product 4. Disposing the product What are the environmental impacts of getting raw materials? - correct answer 1. damage the local environment (mi...

AQA Chemistry - Organic Chemistry 2023 Test Questions Answers How is crude oil formed? - ANSWER Over millions of years from the fossilised remains of plankton Where is crude oil found? - ANSWER In the porous rocks in the Earth's crust Is crude oil renewable or non-renewable? - ANSWER Non-renewable What is crude oil made up of? - ANSWER Hydrocarbons What gives hydrocarbon molecules varying properties? - ANSWER They vary in siz...

The following is true of protons: correct answer: They are in the center or nucleus of an atom Essential oils containing alcohols have ___ action: correct answer: antiseptic Two or more atoms that share electrons are: correct answer: molecules The following is true of terpenes: correct answer: Terpenes are made of carbon and hydrogen atoms The type of bonding found in essential oil components is best described as: correct answer: covalent Essential oils containing coumarins a...

Edexcel iGCSE Chemistry, question and answer with rated solution Experiment for Diffusion? 1) HCl placed at one end of the test tube, ammonia solution at the other. 2) Where they meet, a ring of Ammonium Chloride appears. 3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. Experiment for Dilution? 1) Put a coloured substance in a solvent e.g food colouring in water. 2) Over the time, the colour le...

GCSE AQA Chemistry Exam With All Answers what is a compound - ANSWER contains atoms of two or more elements which are chemically combined in fixed proportions how can compounds be separated into their component elements - ANSWER chemical reactions or electrolysis why is the total mass of products equal to the total mass of reactants - ANSWER no atoms are lost or made what is a mixture - ANSWER contains two or more elements or compounds which are not chemically...

AAMC FL4 Exam Questions and Answers 2024 spontaneous reaction -Answer-delta g is negative if the reaction is not spontaneous, delta g is positive. equilibrium constant -Answer-products over reactants; do not include solids and liquids According to Table 1, what is the concentration of the glucose in the blood from which the diluted sample was taken? Passage: table & a blood sample with 1/30 dilution ratio was mixed in a transparent cuvette with an oxygen- acceptor solution containing gl...

AQA GCSE Chemistry - Paper 1 Exam Questions With Complete Solutions What is the charge of a proton? - ANSWER +1 What is the charge of a neutron? - ANSWER 0 What is the charge of an electron? - ANSWER -1 What is the relative mass of a proton? - ANSWER 1 What is the relative mass of a neutron? - ANSWER 1 What is the relative mass of an electron? - ANSWER Very small How many types of atoms do elements contain? - ANSWER Only one type What are compo...

RRT EXAM Questions with 100% Correct Answers Verified | Updated 2024/2025 therapeutic gases Air, Oxygen, Heliox (Helium/oxygen) Carbon Dioxide, Nitric Oxide Laboratory gases Nitrogen, helium, and carbon dioxide Anesthetic gases nitrous oxide Fire Risk Classifications Non-flammable (do not burn); Oxidizing (non-flammable but supportive of combustion); Flammable (burns readily, potentially explosive) Characteristics of o2 Odorless, tasteless, colorless Non-flammable, b...

AQA GCSE Chemistry - Paper 1 Question And Answer 2023 What is the charge of an electron? - Correct Answer -1 What is the relative mass of a proton? - Correct Answer 1 What is the relative mass of a neutron? - Correct Answer 1 What is the relative mass of an electron? - Correct Answer Very small How many types of atoms do elements contain? - Correct Answer Only one type What are compounds? - Correct Answer Substances containing two or more different elements that are chemically ...