Mr Barnes Teaches Chemistry Codes - How To:
I have given each outcome for the GCSE a code, which you can find below.
Look through the codes (CH1, etc...) and if you want to find out some information about it, add the number to the code finder at the top of the page. This will take you to a revision section with a revision video and revision material.
I am working on practice questions and model answers - these will follow.
I hope you find it useful!
Mr Barnes
CH1 - Recall the formulae of elements, simple compounds, and ions
CH2 - Pick information from the text to write word equations
CH3 - Write word equations for the reactions of metals with oxygen
CH4 - Write word equations for the reactions of metals with water
CH5 - Write word equations for the displacement reactions
CH6 - Write word equations for complete combustion
CH7 - Write word equations for the reactionsbetween Acids and Bases
CH8 - Write word equations forreduction reactions
CH9 - Write simple balanced equations when given the formula of the reactants and products
CH10 - Use state symbols to strengthen Chemical Equations
CH11 - Write balanced chemical equations when given the names of the reactants and products
CH12 - Write balanced chemical equations for the reactions of metals with oxygen
CH13 - Write balanced chemical equations for the reactions of metals with water
CH14 - Write balanced chemical equations for the displacement reactions
CH15 - Write balanced chemical equations for complete combustion
CH16 - Write balanced chemical equations for the reactions between Acids and Bases
CH17 - Write balanced chemical equations for reduction reactions
CH18 - Write balanced ionic equations
CH19 - Write balanced ionic equations for neutralisation reactions
CH20 - Write balanced ionic equations for precipitation reactions
CH21 - Write balanced ionic equations for displacement reactions
CH22 - Evaluate the risks in a practical procedure and suggest suitable precautions
CH23 - Draw simple graphs
CH24 - Interpret data from tables
CH25 - Calculate percentages
CH26 - Calculate Means
CH27 - Describe how ideas of the atom have changed
CH28 - Describe the structure of the atom
CH29 - Identify the charge and mass of the sub-atomic particles
CH30 - Explain why atoms are neutral
CH31 - Compare the size of the nucleus to the atom
CH32 - Identify where most of the mass of the atom is
CH33 - Recall the meaning of the term mass number
CH34 - Describe why the atomic number is unique
CH35 - Calculate the number of protons, neutrons and electrons in an atom
CH36 - Draw and write the electronic configuration for elements 1-20
CH37 - Relate the electronic configuration to the position on the periodic table
CH38 - Describe what an isotope is
CH39 - Explain why some mass numbers are not whole
CH40 - Calculate the relative atomic mass of an isotope
CH41 - Estimate the abundance of different isotopes
CH42 - Describe how Mendeleev arranged the Periodic Table
CH43 - Describe how Mendeleev predicted the properties of unknown elements
CH44 - Explain why Mendeleev was wrong when he ordered elements by atomic mass
CH45 - Relate the atomic number to the position in the periodic table
CH46 - Describe how the periodic table is structured
CH47 - Explain the position of metals and non-metals on the Periodic Table
CH48 - Explain how ionic bonds form
CH49 - Describe what an ion is
CH50 - Calculate the number of protons, neutrons and electrons in an ion
CH51 - Explain the formation of ions in groups 1, 2, 6 and 7
CH52 - Draw dot and cross diagrams to show ionic bonding
CH53 - Explain the use of the endings –ide & –ate in compounds
CH54 - Work out the formula of ionic compounds when given the charges of the ions
CH55 - Explain the lattice structure of ionic compounds
CH56 - Explain why ionic compounds have high melting points
CH57 - Explain why ionic compounds only conduct when molten
CH58 - Explain what a covalent bond is
CH59 - Describe what a molecule is
CH60 - Identify the size of covalent molecules
CH61 - Use dot and cross diagrams to explain covalent bonding
CH62 - Explain why simple covalent compounds have low melting points
CH63 - Explain why simple covalent compounds do not conduct electricity
CH64 - Use Diamond and Graphite to explain what giant covalent substances are
CH65 - Describe the structures of graphite and diamond
CH66 - Explain the uses of diamond and graphite
CH67 - Explain the properties of fullerenes and graphene
CH68 - Explain why metals have high melting points
CH69 - Explain why metals can conduct electricity
CH70 - Explain why metals are malleable
CH71 - Describe the properties of metals and non-metals
CH72 - Describe what polymers are
CH73 - Describe the limitations of models
CH74 - Recall the properties of each type of bonding
CH75 - Identify the type of bonding occurring from a table of properties
CH76 - Explain how to investigate the type of bonding occurring
CH77 - Explain how and why elements and compounds can be classified
CH78 - Calculate relative formula mass
CH79 - Calculate the empirical formulae of a compound from reacting masses
CH80 - Work out the simplest ratio and molecular formula of a compound
CH81 - Describe an experiment to determine the empirical formula of magnesium oxide
CH82 - Explain the law of conservation of mass
CH83 - Calculate masses of reactants and products from balanced equations
CH84 - Calculate the concentration in g dm⁻³
CH85 - Describe the moles of a substance, including Avogadro's constant
CH86 - Calculate the number of moles, mass and particles of a substance
CH87 - Describe what the limiting reactant is in a chemical reaction
CH88 - Deduce the stoichiometry of a reaction from the masses of the reactants and products
CH89 - Describe the properties of solids, liquids and Gases
CH90 - Explain what is happening during state changes
CH91 - Explain state changes using Melting Point graphs
CH92 - Predict the state of different substances
CH93 - Explain the meaning of 'Pure' in Chemistry
CH94 - Draw Melting Point graphs for pure and impure solids
CH95 - Explain how to separate an insoluble solid from a mixture
CH96 - Explain how to separate a soluble solid from a solution
CH97 - Explain how to separate a soluble and insoluble solid from a mixture
CH98 - Describe how to set up a paper chromatogram
CH99 - Describe the different phases of paper chromatography
CH100 - Interpret a chromatogram
CH101 - Calculate the Retention Factor for a chromatogram
CH102 - Explain how simple distillation can be used to separate mixtures of liquids
CH103 - Explain how fractional distillation can be used to separate multiple liquids
CH104 - Explain how to separate two substances
CH105 - Core Practical: Investigate the composition of inks
CH106 - Describe how to make saltwater potable (safe to drink)
CH107 - Explain the stages necessary to make lake water potable (safe to drink)
CH108 - Explain the importance of chemical analysis
CH109 - Describe acids and alkalis in terms of ions
CH110 - Identify the pH of acids, alkalis and neutral substances
CH111 - Identify the effect of acids and alkalis on indicators
CH112 - Explain the terms dilute and concentrated
CH113 - Explain the terms weak and strong acids
CH114 - Describe what a base is
CH115 - Describe what an alkali is
CH116 - Explain the general reactions of aqueous solutions of acids with metals
CH117 - Explain the general reactions of aqueous solutions of acids with metal oxides/hydroxides
CH118 - Explain the general reactions of aqueous solutions of acids with metal carbonates
CH119 - Describe the chemical test for hydrogen
CH120 - Describe the chemical test for carbon dioxide
CH121 - Explain what is seen when an acid is added to a base
CH122 - Explain acid-alkali reactions in terms of ions
CH123 - Link the concentration of ions to the pH of acids and alkalis
CH124 - Work out the change in pH when the concentration increases by a factor of 10
CH125 - Explain how to prepare a soluble salt from an acid and an insoluble reactant
CH126 - Core Practical: Investigate the preparation copper sulfate crystals
CH127 - Core Practical: Investigate the change in pH
CH128 - Explain how to prepare a soluble salt from an acid and a soluble reactant
CH129 - Describe how to carry out an acid-alkali titration to prepare a pure, dry salt
CH130 - Recall the main rules of solubility
CH131 - Predict whether a precipitate will form in a displacement reaction
CH132 - Describe the method used to prepare a pure, dry sample of an insoluble salt
CH133 - Describe what electrolytes are
CH134 - Describe the process of electrolysis
CH135 - Explain the movement of ions during electrolysis
CH136 - Explain how electrolysis can be used to purify copper
CH137 - Investigate the electrolysis of copper sulfate (CORE PRACTICAL)
CH138 - Explain the formation of the products in electrolysis
CH139 - Write half equations for electrolysis
CH140 - Explain oxidation and reduction in terms of electrons
CH141 - Describe where oxidation and reduction are occurring during electrolysis
CH142 - Deduce the reactivity of metals, by their reactions with water, acids, and salt solutions
CH143 - Explain displacement reactions as redox reactions, in terms of gain or loss of electrons
CH144 - Explain the reactivity series of metals in terms of the reactivity with water and dilute acids
CH145 - Explain the link between reactivity and rate of oxidation
CH146 - Recall how metals are found in the Earth's crust
CH147 - Explain oxidation as the gain of oxygen and reduction as the loss of oxygen
CH148 - Recall that the extraction of metals involves reduction of ores
CH149 - Explain how to extract a metal from its ore
CH150 - Evaluate alternative biological methods of metal extraction (bacterial and phytoextraction)
CH151 - Evaluate the advantages of recycling metals
CH152 - Describe what a lifetime assessment for a product involves
CH153 - Evaluate data from a life cycle assessment of a product
CH154 - Recall that chemical reactions are reversible
CH155 - Explain what is meant by dynamic equilibrium
CH156 - Describe the formation of ammonia
CH159 - Recall the typical properties of the transition metals.
CH160 - Describe how corrosion forms
CH161 - Explain how rusting of iron can be prevented
CH162 - Explain the uses of electroplating
CH163 - Explain how alloying makes metals stronger
CH164 - Explain how the uses of metals are related to their properties
CH165 - Calculate the concentration of solutions in moldm⁻³ and convert into g dm⁻³
CH166 - Core Practical: Carry out an accurate acid-alkali titration
CH167 - Carry out simple calculations using the results of titrations
CH168 - Calculate the percentage yield
CH169 - Explain why the actual yield is usually less than 100%
CH170 - Recall and calculate the atom economy
CH171 - Explain how to choose an appropriate reaction pathway
CH172 - Describe and calculate molar volumes
CH173 - Calculate volumes of gases using Avogadro’s law.
CH174 - Describe the factors that affect the yield of Ammonia in the Haber Process
CH175 - Describe the composition and uses of fertilisers
CH176 - Describe the formation of ammonium nitrate fertiliser
CH177 - Describe the formation of ammonium sulfate fertiliser
CH178 - Describe what a chemical cell is
CH179 - Describe what happens in a hydrogen-oxygen fuel cell
CH181 - Identify the different groups in the Periodic Table
CH182 - Recall the physical properties of the alkali metals
CH183 - Describe the reactions of lithium, sodium and potassium with water
CH184 - Describe the pattern in reactivity of the alkali metals
CH185 - Explain the reactivity of the alkali metals
CH186 - Explain why the noble gases are chemically inert
CH187 - Explain the uses of the noble gases
CH188 - Describe the pattern in the physical properties of the noble gases
CH189 - Recall the colours and states of Cl2, Br2 & I2
CH190 - Describe the properties of the halogens
CH191 - Describe the chemical test for chlorine
CH192 - Describe the formation of metal halides
CH193 - Describe what happens when hydrogen halides are dissolved in water
CH194 - Describe how to use displacement reactions to prove the reactivity of the halogens
CH195 - Explain displacement reactions of the halogens in terms of oxidation and reductions
CH196 - Explain the reactivity of the halogens in terms of electronic configurations
CH197 - Investigate the effects of changing the conditions on rates of reaction (Core Practical)
CH198 - Explain what is necessary for a chemical reaction to occur
CH199 - Explain how to increase the rate of reaction in terms of collision theory.
CH200 - Interpret graphs of mass, volume or concentration of reactant or product against time
CH201 - Give examples of energy changes in reactions
CH202 - Describe endothermic and exothermic changes in terms of heat energy
CH203 - Draw and label reaction profiles for endothermic and exothermic reactions
CH204 - Explain what happens, in terms of energy, when bonds break and bonds form
CH205 - Explain how a chemical reaction is either exothermic or endothermic overall
CH206 - Calculate the energy change in a reaction given the energies of bonds (in kJ mol⁻¹)
CH207 - Describe what a catalyst is
CH208 - Explain the term activation energy
CH209 - Describe what an enzyme is
CH210 - Explain the effect of catalysts on activation energy
CH211 - Describe what a hydrocarbon is
CH212 - Describe what crude oil is made up of
CH213 - Explain what a homologous series is
CH214 - Describe the term "non-renewable"
CH215 - Describe and explain fractional distillation
CH216 - Recall the names and uses of the fractions of crude oil
CH217 - Explain how the properties of the fractions of crude oil differ from each other
CH218 - Explain the process of cracking
CH219 - Explain why cracking is necessary
CH220 - Describe complete combustion using word and symbol equations
CH221 - Describe what incomplete combustion is using word and symbol equations
CH222 - Explain how carbon monoxide behaves as a toxic gas
CH223 - Describe the problems caused by incomplete combustion
CH224 - Evaluate the advantages and disadvantages of using hydrogen as a fuel in cars
CH225 - Explain how acid rain forms
CH226 - Explain the effects of acid rain
CH227 - Explain how oxides of nitrogen form, and their effects
CH228 - Describe the formation of the Earth's early atmosphere
CH229 - Explain how the Earth's oceans formed
CH230 - Explain how carbon dioxide levels have decreased since the oceans formed
CH231 - Explain the effects of primitive plants on the atmosphere
CH232 - Describe the chemical test for oxygen
CH233 - Explain the greenhouse effect
CH234 - Evaluate the evidence for human activity causing climate change
CH235 - Describe the possible effects of climate change
CH236 - Explain how the effects of climate change can be mitigated
CH237 - Explain why the test for any ion must be unique
CH238 - Describe how to carry out flame tests
CH239 - Describe tests to identify the ions using sodium hydroxide solution
CH240 - Describe the test for ammonia
CH241 - Describe tests to identify different anions
CH242 - Core Practical: Identify the ions in unknown salts
CH243 - Describe the advantages of instrumental methods
CH244 - Evaluate data from a flame photometer
CH245 - Recall and draw the structure of different alkanes
CH246 - Recall and draw the structure of different alkenes
CH247 - Describe the test for alkanes and alkenes
CH248 - Describe the complete combustion of alkanes and alkenes
CH249 - Recall and draw the structure of different alcohols
CH250 - Describe the dehydration of alcohols
CH251 - Core Practical: Investigate the temperature rise per gram by the combustion of alcohols
CH252 - Describe the production of ethanol by fermentation
CH253 - Explain how to obtain a concentrated solution of ethanol by fractional distillation
CH254 - Describe the addition polymerisation of ethene to form polyethene
CH255 - Describe the addition polymerisation of polypropene, PVC and Teflon
CH256 - Deduce the structure of a monomer from the structure of a polymer and vice versa
CH257 - Explain how the uses of polymers are related to their properties
CH258 - Describe the problems associated with polymers
CH259 - Link knowledge of polymers to DNA, Starch and Proteins
CH260 - Recall and draw the structure of carboxylic acids
CH261 - Describe the properties of carboxylic acids
CH262 - Describe how alcohols can be oxidised to produce carboxylic acids
CH263 - Explain what polyesters are using condensation polymerisation
CH264 - Compare the size of nanoparticles with the sizes of atoms and molecules
CH265 - Calculate the surface area- to-volume ratio for nanoparticles
CH266 - Describe how the properties of nanoparticulate materials are related to their uses
CH267 - Explain the risks associated with nanoparticles
CH268 - Describe the physical properties of glass and clay ceramics
CH269 - Describe the physical properties of composites
CH270 - Compare the physical properties of ceramics, polymers, composites, and metals