Chemical Reactions notes
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This Chemical Reactions page gathers over 80 community-made notes, covering topics from reaction rates and acids and bases to redox and reversible reactions. School students can use them to practice these topics, while teachers can find material for lessons. Choose a set of notes to start studying.
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- Chemical and Physical Changes103
- Chemical Equations and Stoichiometry118
- Types of Chemical Reactions217
- Acids, Bases and Salts105
- Metal Reactivity and Displacement67
- Oxidation, Reduction and Corrosion43
- Combustion72
- Thermal Decomposition and the Limestone Cycle20
- Precipitation Reactions12
- Electrolysis19
- Energy Changes in Reactions131
- Rates of Reaction121
- Reversible Reactions and Equilibrium36
- Chemical Reactions in Baking and Cooking112
Notes
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5.2 Displacement Reactions 5.2 Displacement Reactions The reactivity series helps to show which metals are more reactive than others. To remember the reactivity series, remember this sentence: "please stop calling me a zebra in the little class...
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Precipitates Precipitation reactions Transition metal hydroxides are insoluble in water.If a solution of any soluble transition metal compound is mixed with sodium hydroxide solution then there is displacement reaction. The sodium...
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Untitled SECTION III: CHEMICAL REACTIONS A chemical reaction occurs when the atoms of one or more substances are rearranged to produce one or more different substances. As a result of a chemical reaction, new substances with n...
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Chemical changes Chemical Changes- Acids and bases Acid= Ph less then 7 Acid= Form H+ ions in water As hydrogen concentration increases pH concentration decreases Bases= React with acid forms salt and water Bases= Alkali w...
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Notes For the following balanced equation: 3 Cu(s) + 8 HNO3(aq) → 3 Cu(NO3)2(aq) + 2 NO(g) + 4 H2O(l) a) How many moles of HNO3 will react with 10 moles of Cu? b) How many moles of NO will form if 0.50 moles of Cu reacts? c...
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Rates of Reactions notes Salts and Electrolysis Topic Notes Neutralisation Reaction: An Acid always contains an H ion An Alkali always contains an OH ion A Neutralisation reaction is: As well as water, a salt is produced in a Neut...
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Chemistry Periodic Table Patterns Atomic size gradually decreases from left to right across a period of elements. Atomic size gradually increases going down a group. Atomic radius decreases from left to right within a period At...
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science revision chemical energy & types of reaction: Understanding Reactions: exothermic: a chemical reaction that releases energy by light or heat endothermic: a chemical reaction that takes in energy by light or heat&n...
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Science term 2 Physical and Chemical Changes In the chemical sciences, changes to materials can be categorised as either physical change or chemical change. Physical change may include change of state (for example, from solid to liq...
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Chemical Reactions What are Chemical Reactions? nature and identity of initial substance changes so, whenever a change occurs, a chemical reaction occurs When a chemical reaction takes place, the following happens change in state of the...
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Chemical Changes Acids and Bases pH scale is a measure of how acidic or alkaline a solution is Lower the pH of a solution, the more acidic it is Higher the pH of solution, the more alkaline it is A neutral substance ...
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Unit 2 & 4 Chemistry binds the evidence for a chemical reaction in a lab:Catalyst: a substance that makes a chemical reaction occur faster without itself being consumed in the reactionLaw of Conservation of Mass: The total mass of reactan...
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Reactive chemistry Chemical change A physical change is a change in the physical properties of a substance or a change in state. A chemical change leads to the formation of new substances with different compositions and different proper...
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Chemistry IONIC BONDING metal & non-metal = ions metal lose electrons = positive ions/ non-metal gain electrons = negative COVALENT BONDING non-metals = molecules atoms share electrons to fill outer shells Calcium carbonate (li...
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Chemical reactions and Acids and alkalis and neutralisationby CGP Chemical reactions In a chemical reaction, all that is really happening is the atoms moving around into new formations. The reactants might give energy, make a bang or make a little dance but the mass won't chan...
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Chemical Changes Reactivity of Metals Metals react with oxygen to produce metal oxides. The reactions are oxidation reactions because the metals gain oxygen. The Reactivity Series
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4. Combustion of Hydrocarbons 4. Combustion provides another opportunity to examine the conditions under which chemical reactions occur 4.1 - Describe the indicators of chemical reactions A permanent change in colour Change in odour Productio...
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Rates Of Reaction he rate of a reaction can be measured by the rate at which a reactant is used up, or the rate at which a product is formed. The temperature, concentration, pressure of reacting gases, surface area of reacting solids, ...
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Oxidation and Reduction Reactions involving the transfer of electrons are known as oxidation - reduction (or redox) reactions. Everyday examples inlclude Rusting The browning of apples Respiration Photosynthesis In the rusting of iron, iron ...
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Introducing Reversible Reactions
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C6 - Revision Summary 2 chemicals that you might come across in everyday life are food additives, cleaning and decorating products. Small scale – pharmaceuticals (drugs). Large scale – sulfuric acid a)Acid b)alkali c)acid d) neutral An exa...
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reactions of metals and the reactivity series - created from Mind Map 90 elements that occur naturally Making salts- acid plus base Making salts - acid plus carbonate
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Notes for 3/17/2026 Chemistry Test VOCAB Chemical Equation - A way to show a chemical reaction using formulas and symblos Law of Conservation of Mass - Matter cannot be created or destroyed Balanced equation - An equation with the same number of e...
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Chemistry C2.4 and 5 Notes for Exam Chemistry Unit 2Rate of Reaction C.4 The rate of a chemical reaction can be found by measuring the amount of a reactant used or the amount of product formed over time: Rate of reaction = amount of reactant used / time...
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Rates of Reaction Temperature The higher the temperature, the higher the rate of reaction. The particles in the substances gain kinetic energy and so move more. This leads to more collisions, which leads to a higher rate of successful ...
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Science term 3 and 4 16.07.19 Reaction Rate Rate of a chemical reaction is how fast a chemical reaction proceeds. Some chemical reactions are very fast and proceed over a very small time span, for example, explosio...
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Untitled Rates Of ReactionsReactions can be fast or slow. The rate of a reaction is the speed in which a reaction happens. The rate of reaction depends on 4 things;Temperature &...
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Energy Chapter 7- Revision summary. Topic What you need to know What you need to be able to do Chemical and physical change · Examples of chemical change · &n...
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Chemistry 2b - created from Mind Map Rates of Reaction Reaction rate=amount of reactant used up /time What effects it? Reaction types Yield Could measure (at timed intervals)... Volume of gas formed Number of bubbles formed Time of for one reactant to di...
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4. Energy is required to extract elements from their naturally occurring sources Physical change no new chemical substances are formed small energy levels required can easily be reversed in some physical changes, chemical bonds are broken or reformed to achieve a change (e.g: when rolling copper, ...
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SC8f - Reactions of acids with metals and carbonates Acids and metals Some metals, such as copper and silver, do not react with dilute acids. Metals such as potassium and sodium react explosively with dilute acids. metals in the middle of the reacti...
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Polltion issues from burning fuels Sulphur dioxide How is it formed? Burning fossil fuels containing sulphur What are the problems with sulphur dioxide? Cause acid rain What are the solutions to acid rain? Remove sulphur from fuel before burning Water ...
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Combustion notes Combustion is the name given to the chemical reaction that we know as burning Types of fire extinguishers: - Water – removes heat energy. Use on wood, paper and textiles - - Powder – Removes oxygen. Use on wood, paper...
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My chemistry revision Lithium:It fizzesIt moves slowly on the surface of the waterIt dissolvesA lit splint causes a squeaky pop. (hydrogen)The universal indicator turns blue : pH 13/14 Sodium:It fizzesIt moves quicker on the surface of the...
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Chemical reactions and word equations! Key words:Chemical reactionReactantProductFormula Chemical Reactions:A teacher heats a small piece of sodium. When the sodium catches fire, she places it in a flask of chlorine. The sodium continues to burn. White fum...
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Chemical Reactions Mixtures and Compounds The the compound of two elements has completely different properties than the products you started with. Alloys and Electroplating Pure metals: the atoms of pure metals are in regular arrangemen...
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Untitled energy transfer in ReactionsAN EXOTHERMIC REACTION IS ONE WHICH TRANSFERS ENERGY TO THE SURROUNDINGS, USUALLY IN THE FORM OF HEAT AND USUALLY SHOWN BY A RISE IN TEMPERATURE hand warmers self heating cans&n...
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Cooking and chemical change Cooking and chemical changeImportant notes for this section: A catalyst is a substance which changes the rate of reaction.Chemical decomposition is the separation of a chemical compound into elements or simpler compou...
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Chemistry 1.5 Demonstrate understanding of aspects of chemical reactions Subject content The actual reactions you will carry out in class will be decided by your teacher but will include all four types: combination, precipitation, displacement and decomposition and all four types will be e...
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About chemical reactions notes
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The notes on this page give you different ways into the unit. Chemical changes covers acids and bases, while Precipitates looks at precipitation reactions. For reaction rates, Rates Of Reaction describes how a rate can be measured and factors that affect it. Other notes cover displacement reactions, oxidation and reduction, and reversible reactions.
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For an introduction to terms, try the notes on chemical reactions and word equations. They include reactant, product and formula. If you already have a topic in mind, choose notes that match it, such as Chemical changes for acids and bases or Redox reactions for oxidation numbers.
What topics do the notes cover?
The notes cover reaction rates, displacement reactions, precipitation, acids and bases, and oxidation and reduction. You can also find notes on combustion and reversible reactions. Choose a topic you are studying, then compare the notes with what you have covered in class.
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