A form of calcium sulphate, obtained from gypsum, mixed with water for making casts and moulds. small quantities of acid or alkali are added § Electrode - a rod which conducts electricity to and from the 298K, raised to the power of their relative concentrations chemistry noun [U] (SCIENCE) the scientific study of the basic characteristics of substances and the ways in which they react or combine: She studied chemistry and physics at college. It is ethanol to which has been added a small amount of methanol to render it unfit to drink. Please sign in or register to post comments. electrolyte Origin of chemistry -: Chemes means black color. Branch of chemistry that deals with carbon compounds,, in particular the more complex ones. By extrapolating the ideal gas law, the internationally agreed-upon value for absolute zero has been determined as −273.15 °C (−459.67 °F; 0.00 K). Proteins that carry out different metabolic and functional reaction in animals and plants. when 1 mole of an ionic solid dissolves in sufficient water to form The electrochemical series is a list of elements in order of their standard electrode potentials. § For not saturated (can dissolve), Ksp > [My+(aq)]x[Xx-(aq)]y all atoms are at rest). It is a special kind of furnace, iron is made inside a blast furnace. Contamination of the atmosphere caused by the discharge, accidental or deliberate, of a wide range of toxic substances. Simply by learning these definitions you can give yourselves a huge boost in your A-Level Chemistry Unit 1! First, it can refer to any process used to make ethanol unfit for consumption (denatured alcohol). tendency to accept electron with reference to the standard A substance that sticks two surfaces together. § Base (BL Theory) - proton acceptor [solute in solvent A] It is a brown or black tar-like substance, a variety of bitumen, found in a natural state or obtained by evaporating petroleum. Thank you for visiting! A colourless, flammable alcohol whose boiling point is 780 C. Ethanol is the alcohol contained in alcohol drinks. § For saturated solution, Ksp = [My+(aq)]x[Xx-(aq)]y Isotope Isotopes are atoms of the same element (same number of protons) with different numbers of neutrons Relative atomic mass, Ar Is the weighted mean mass of an atom of an element compared with one-twelfth of the… § Faraday's 1st Law of Electrolysis - the mass of substance It describes iron or any metal which contains iron. A heavy, soft, silver-white, malleable and ductile, metallic element. [solute in solvent B], § Entropy - measure of dispersal of energy at a specific § Electrolyte - the compound that is decomposed It is a useful variety of a rock-forming mineral which is fibrous, very heat-resistant and chemically inert. It is a colourless, odourless, tasteless gas about one and a half times as heavy as air. [!!][!! A pain killing drug, It is the main alkaloid present in opium, being 10 percent of its weight. § Common ion effect - the reduction in the solubility of a § pH + pOH = 14 We use the unit of Kelvins for these readings. A white crystalline solid which is 550 times sweeter than sugar, but does not have any food value. It is a gas used in chemical warfare which is especially damaging to the nervous and respiratory systems. Compounds internally secreted in animal which stimulated organs in their respective action. Sometimes the easiest way to understand and remember essential definitions and technical terms is to constantly recite it with your friends and question each other. It is present in the nucleus of the hydrogen. § ∆Sθtotal = Sθsystem + Sθsurroundings, Defn list - Definition list for CIE A-Level Chemistry 9701, Copyright © 2021 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Share your documents to get free Premium access, Upgrade to Premium to read the full document, Definition list for CIE A-Level Chemistry 9701, 129608288 Investments Solution Manual Bodie Kane Marcus Mohanty, Case 16 - Tesla Motors in 2016 Will Its Strategy be Defeated by Low Gasoline Prices and Mounting Competition, Tutorial Chapter 2 & 3 - Practical for revision for final exam, Assignment 1 CHE142 - just simple tutorial, Course Plan 202001 IC S - foundation - Inorganic Chemistry, Gun past Year try - Just a homework that i completed. required to discharge one mole of an ion at an electrode equals Another word for chemistry. It is a colourless gas which can make people cough. pass the copyscape test. intermolecular force - the sum of all forces between neighboring molecules. distort the electron cloud of an anion Lavoisier is known as father of Modern Chemistry. Conversion of a liquid into vapour without necessarily reaching the boiling point. A white solid used in medicine for the treatment of asthma colds. From the textbook Physical Science, (Glencoe Science made) Chapters 15-21 excluding 18. absolute zero A theoretical condition concerning a system at the lowest limit of the thermodynamic temperature scale, or zero kelvins, at which the system does not emit or absorb energy (i.e. Chemistry is the science that tells us what things and people are made of; for example, that water is really H2O, two atoms of hydrogen and one of oxygen. The central dense part of an atom which contains practically all its mass. It is also called methyl alcohol or wood spirit. metal/metal ion system and another system These glossaries will help students learn all the key phrases needed for their exams. These are organic compounds like benzene which have a strong smell. A list of definitions for AS AQA Chemistry, lifted directly from the mark schemes of past exam papers. It has a slightly lower octune rating than leaded petrol, but has the advantage of not polluting the atmosphere with lead compounds. This is not an exhaustive list but contains all the ones that have come up in … It is a common antacid. These are the chemicals that produce positively charged hydrogen ions (H+) or a proton in solutions. § Generally, pX = -log X Glass containing lead silicate used for optical purposes. Chemicals which are important to the proper working of the body. It is the branch of chemistry that investigates the rates of chemical reactions. It is a common insecticide insoluble in water, easily soluble in ethanol and acetone. Notify me of follow-up comments by email. 2. A useful glossary of all the important terms. the two half cells The addition of chlorine to drinking water and to water used in swimming pools in order to kill dangerous bacteria. The movement of solvent (liquid) through a semipermeable membrane separating solutions of different concentrations. Learn with flashcards, games, and more — for free. Hydrates of magnesium sulphate used in medicines to empty bowels. A natural occurring mineral normally mined for the extraction of metal on a commercial scale. insulin, adrenaline, testosterone, etc. cane sugar, glucose, starch, etc. 23. Communities Find a chemistry community of interest and connect on a local and global level. It is a kind of coloured powder, It is mixed with liquids make paint. each ion in a saturated solution of a sparingly soluble salt at It is a sweetish, colourless liquids and used as a solvent and anaesthetic. A highly poisonous liquid which vaporises easily and is sued in chemical warfare. A process by which green plants trap light energy and use it to drive a series of chemical reactions, leading to the formation of carbohydrates. A mixture of cement, sand and water used to bind together bricks and stones. See more. The crude, unrefined form of iron produced in a blast furnace. Fats and their derivatives that occur in living systems. It is a unit for measuring the dose of radiation. e.g. It is a chemical element, a hard, white metal which does not corrode easily. It is a substance which does not burn and does not change when it is heated. 133. electrolyte So spread the word to your friends about this post and recite the definitions together. § Precipitation when Ksp < [My+(aq)]x[Xx-(aq)]y State of a solid that has been heated until it melts. Egyptian called black earth as “chemi ” and in early age the study of chemical science was known as chemistry. A solution which is made by the action of bacteria on wine or cider. Class of organic compounds present in animals and plants. water to form a very dilute solution, § Electrolysis - decomposition of a compound into its elements It is the science concerned with composition of matter and of the changes that take place in it under certain condition. It is the study of the materials that make up our bodies and everything in the world around us. at one electrode and oxygen gains electrons at the other Required fields are marked *, You may use these HTML tags and attributes:
. A chemical change brought about in organic substance by the enzymatic action of living organism such as yeast and bacteria. A poisonous oily liquid which is the principle compound in tobacco. A thick oil extracted from the oil of mint and used as an antiseptic and anaesthetic. § Polarising power - the ability of a cation to attract electrons and It is called carbamide, it is a white crystalline organic compound with m.p. It is used by doctors to help some of their patients. Base, in chemistry, any substance that in water solution is slippery to the touch, tastes bitter, changes the color of indicators (e.g., turns red litmus paper blue), reacts with acids to form salts, and promotes certain chemical reactions (base catalysis). Centrifugal forces two or more elements that are chemically bonded ( molecule or ions ) the action... And magnesium salts which provides protection against corrosion or decay that causes distortions in and... 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