Tutor myself chemistry edexcel igcse

Tutor myself chemistry edexcel igcse. The empirical formula shows the simplest whole number ratio of atoms present in a compound. ΔH is measured in kJ/mol (kilojoules per mole). For example, alkenes as described as unsaturated molecules. ΔH must also labelled. Catalyst: A substance that speeds up a chemical reaction while remaining chemically unchanged at the end of the reaction. Edexcel site; Links; Teaching; Simulations; Physics. An example is tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Toggle Sliding Bar Area Select a set of flashcards to study: Alkenes react with bromine water. For example: This is how we can test for the Group 7 elements are called the Halogens. Toggle Sliding Bar Area Select a set of flashcards to study: Related Posts: 1. A platinum or nichrome wire is dipped into concentrated hydrochloric acid to remove any impurities. Allotropes are different forms of the same element. The wire is dipped into the salt being tested so some salt sticks to the end. Toggle Sliding Bar Area Select a set of flashcards to study: In a substitution reaction an atom or group of atoms is replaced by a different atom or group of atoms. Three different allotropes of carbon are shown here as examples: diamond, graphite and C 60 fullerene. 17 know and use the relationship between unbalanced force, mass and acceleration : F = M x A; 1. CaCO3 --> CaO + CO2 Step 1: Calculate the amount, in moles, of 25 g of calcium carbonate (CaCO3) \\[M_r(CaCO_3)=(1 \\times The empirical formula shows the simplest whole-number ratio between atoms/ions in a compound. Three different allotropes of carbon are shown here as examples: diamond, graphite and C60 fullerene. The salts shown on this graph are typical: the solubility increases as temperature increases. Unsaturated: A molecule containing a carbon-carbon double or triple bond. Biodegradable: the breakdown of a substance by microorganisms. Giant 3D lattice of sodium chloride (NaCl) A functional group is an atom or a group of atoms that determine the chemical properties of a compound. 18 know and use the relationship between weight, mass and gravitational field strength: W=mxg tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. The salt water is boiled. Toggle Sliding Bar Area Select a set of flashcards to study: Oxidation Oxidation is the loss of electrons. 3(a) Units (b) Properties of waves (c) The electromagnetic spectrum (d) Light and sound; 4 Energy resources 1:58 (Triple only) describe experiments to investigate electrolysis, using inert electrodes, of molten compounds (including lead(II) bromide) and aqueous solutions (including sodium chloride, dilute sulfuric acid and copper(II) sulfate) and to predict the products tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Finding the formula of a metal oxide experimentally The formulae of metal oxides can be found experimentally by reacting a metal with oxygen and recording the mass changes. . Covalent compounds do not conduct electricity because there are no charged particles that are free to move. Toggle Sliding Bar Area Select a set of flashcards to study: Saturated: A molecule containing only single bonds between carbon atoms. Within each molecule are atoms bonded to each other covalently. This is because larger molecules (molecules with more mass) have more forces of attraction between them. Step 3: Divide by their tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. This is an addition reaction. The rate of reaction can be calculated using the following equation: The units for rate of reaction will usually be grams per min (g/min) An tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Galvanising: (coating in zinc) also prevents water and oxygen getting to the iron, but with galvanising even if the barrier is broken the more reactive zinc corrodes before the less reactive iron. This is called a condensation polymerisation reaction. 84 g of chlorine? Step 1: Put the symbols for each element involved at the top of the page. Toggle Sliding Bar Area. 1:01 understand the three states of Yield is how much product you get from a chemical reaction. In most chemical reactions, however, you rarely achieved your theoretical yield. 1(a) Units (b) movement and position (c) forces, movement, shape and momentum; 2 Electricity. 3(a) Units (b) Properties of waves (c) The electromagnetic spectrum (d) Light and sound; 4 Energy resources 2:34 know the general rules for predicting the solubility of ionic compounds in water: common sodium, potassium and ammonium compounds are soluble, all nitrates are soluble, common chlorides are soluble, except those of silver and lead(II), common sulfates are soluble, except for those of barium, calcium and lead(II), common carbonates are insoluble, except for those of sodium, potassium and Edexcel iGCSE Physics. Toggle Sliding Bar Area Select a set of flashcards to study: A catalyst is a substance which increases the rate of reaction without being chemically changed at the end of the reaction. chlorine will displace bromine:. 3(a) Units (b) Properties of waves (c) The electromagnetic spectrum (d) Light and sound; 4 Energy resources Edexcel iGCSE Physics. The following formula allows for the interconversion between a mass in grams and a number of moles for a given substance: Example 1:. The theoretical yield is the amount of product that you would expect to get. Boost your confidence and get ready to ace your IGCSE Chemistry exam. 3(a) Units (b) Properties of waves (c) The tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. The rate of reaction can be calculated using the following equation: The units for rate of reaction will usually be grams per min (g/min) An May 13, 2019 · Below is a diagram showing the reaction profile for the reaction of hydrogen with oxygen, which is EXOTHERMIC: The activation energy is the minimum amount of energy required to start the reaction. Example: When magnesium is burned in air, it reacts with oxygen (O2) to form magnesium oxide (MgO). Galvanising: (coating in zinc) also prevents water and oxygen getting to the iron, but with galvanising even if the barrier is broken the more reactive zinc corrodes before The solubility of solids changes as temperature changes. EXPERIMENT1: Displacement, dissolving and neutralisation reactions Example: magnesium displacing copper from copper(II) sulfate Method: 50 cm3 of copper(II) sulfate is measured and transferred into a Increasing the surface area of a solid: more particles exposed more frequent collisions increase the rate of a reaction Increasing the concentration of a solution or pressure of a gas: more particles in same space more frequent collisions increase rate of reaction Increasing the temperature: particles have more kinetic energy more frequent collisions and a higher proportion of those collisions tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. 3(a) Units (b) Properties of waves (c) The electromagnetic spectrum (d) Light and sound; 4 Energy resources tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. For example, the solubility of sodium chloride (NaCl) in water at 25⁰C is about 36g per 100g of water. 1:46 understand how to use dot-and-cross diagrams to represent covalent bonds in: diatomic molecules, including hydrogen, oxygen, nitrogen, halogens and hydrogen halides, inorganic molecules including water, ammonia and carbon dioxide, organic molecules containing up to two carbon atoms, including methane, ethane, ethene and those containing halogen atoms Edexcel iGCSE Physics. The general formula shows the relationship between the number of atoms of one element to another within The rate of a chemical reaction can be measured either by how quickly reactants are used up or how quickly the products are formed. The double bond is broken and the bromine atoms are added. After deeply investigating the students' common difficulties in IGCSE Chemistry, I prepared straightforward and schematic teaching resources using both Cambridge and Pearson Edexcel IGCSE sources. Toggle Sliding Bar Area Select a set of flashcards to study: Polymers are inert (unreactive) as they have strong C-C bonds. The salt is left behind in the flask. Solubility is defined in terms of the maximum mass of a solute that dissolves in 100g of solvent. As you go up group 7 (decreasing atomic number), the elements become more reactive. Toggle Sliding Bar Area Select a set of flashcards to study: Carbon dioxide (CO2) has a simple molecular structure. UV light is not required for this reaction. These particles need to be free to move in a substance for that substance to be conductive. The change in heat (enthalpy change) can be represented on an energy level diagram. For example, fluorine is the most reactive and astatine is the least reactive. tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. 1(a) Units GCSE Chemistry Full Spec Points Hydr0Gen 2021-06-19T18:34:14+00:00. Toggle Sliding Bar Area Select a set of flashcards to study: Underneath are the tests for : ammonium ion test, copper (II) ion test, iron (II) ion test, iron (III) ion test Describe tests for the cation NH4+, using sodium hydroxide solution and identifying the ammonia evolved Describe tests for the cations Cu2+, Fe2+ and Fe3+, using sodium hydroxide solution First, add Metals which are above hydrogen in the reactivity series will react with dilute hydrochloric or sulfuric acid to produce a salt and hydrogen. The rate of a chemical reaction can be measured either by how quickly reactants are used up or how quickly the products are formed. 2(a) Units (b) Mains electricity (c) Energy and voltage in circuits (d) Electric charge; 3 Waves. Method: • Weigh tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. This video covers the Double content of Topic 4C Alkanes in preparation for the Edexcel IGCSE Chemistry exam. Toggle Sliding Bar Area Select a set of flashcards to study: tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Learn and revise Edexcel iGCSE Chemistry topics with TutorMyself Chemistry. Oxidation: the loss of electrons or the gain of oxygen Reduction: the gain of electrons or the loss of oxygen Example: The electrolysis of lead (II) bromide, PbBr 2. This can be plotted on a solubility curve. Learn how to study and test yourself effectively with the best methods and tips. For example a sodium atom (Na) loses an electron to become a sodium ion (Na⁺). A more reactive halogen will displace a less reactive halogen, e. 96 g of magnesium combines with 2. metal + acid → salt + hydrogen For example: magnesium + hydrochloric acid → magnesium chloride + hydrogen Mg (s) + 2HCl tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. if burnt the addition polymers could produce toxic gases such as carbon monoxide and hydrogen chloride. Copper. For example: separating water from salt water. For an exothermic reaction, the products have less energy than the reactants. A catalyst is not used up in a reaction. Diamond is made up of only carbon atoms, in a giant 3D lattice, where each of those atoms has a strong covalent bonds to Allotropes are different forms of the same element. A Homologous series is a group of substances with: the same general formula similar chemical properties because Calorimetry allows for the measurement of the amount of energy transferred in a chemical reaction to be calculated. The mass depends on the temperature. Calculate the amount, in moles, of 8. The molecular formula shows the actual number of atoms of each type of element in a molecule. Use the timestamps below to Browse our range of Edexcel IGCSE Chemistry past papers and mark schemes. Testing yourself with past papers is a great way to identify knowledge gaps, improve your exam technique and get more familiar with the exam format. For example when ethane reacts with bromine gas one of the hydrogen atoms in ethane is substituted by one of the atoms of bromine from within the bromine molecule: CH₃-CH₃ + Edexcel site; Links; Teaching; Simulations; Physics. Example: When calcium carbonate (CaCO3) is heated calcium oxide is produced. You can use reacting mass calculations to calculate the mass of calcium oxide produced when heating 25 g of calcium carbonate. Calculating the Empirical Formula Example: What is the empirical formula of magnesium chloride if 0. A catalyst speeds up a reaction by providing an alternative pathway with lower activation energy. For example the functional group of an alcohol is the -OH group and that of alkenes is the C=C carbon to carbon double bond. Jul 22, 2020 · 4C Alkanes (Double) - Edexcel IGCSE Chemistry. The difference between 3. For example, the graph above shows that in 100g of water at 50⁰C the maximum mass of potassium nitrate (KNO₃) tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. In an exothermic reaction, the reactants have more energy than A flame test is used to show the presence of certain metal ions (cations) in a compound. Edexcel iGCSE Physics. 1 Forces and motion. The water vapour condenses back into a liquid when passed through the condenser. Where each joins to the next a small molecule, such as water or hydrogen chloride, is lost. 12 Explain some of the uses of electromagnetic radiations, including: radio waves: broadcasting and communications, microwaves: cooking and satellite transmissions, infrared: heaters and night vision equipment, visible light: optical fibres and photography, ultraviolet: fluorescent lamps, x-rays: observing the internal structure of objects and materials, including for medical applications Ionic compounds have high melting and boiling points because they have a giant structure with strong electrostatic forces between oppositely charged ions that require a lot of energy to break. May 13, 2019 · Titration is used to find out precisely how much acid neutralises a certain volume of alkali (or vice versa). During this reaction there is a colour change from orange to colourless. Note: cold water is 75% of chlorine atoms are the type 35Cl (have a mass number of 35)25% of chlorine atoms are of the type 37Cl (have a mass number of 37)In order to calculate the relative atomic mass (Ar) of chlorine, the following steps are used:Multiply the mass of each isotope by its relative abundanceAdd those togetherDivide by tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. This is calculated using reacting mass calculations. These covalent bonds inside the molecules are strong. The diagram shows the titration method for a neutralisation reaction between hydrochloric acid and sodium hydroxide, using phenolphthalein as an indicator. These forces, although weak, must be overcome if the substance is to boil, and larger molecules have more attractions which must be overcome. 8 g of carbon dioxide (CO 2). Another definition of oxidation is the gain of oxygen. Step 2: Underneath, write down the masses of each element combining. So the molecular formula is a multiple of the empirical formula. Find comprehensive notes, flashcards, past papers, videos and quizzes for Edexcel iGCSE Chemistry on this site. Toggle Sliding Bar Area Select a set of flashcards to study: Polyesters are polymers formed when two types of monomer join together alternately. For example, alkanes as described as saturated molecules. For example, for ethane: Molecular formula = C2H6 Empirical formula = CH3 Here are some more examples: Notice from the table tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Find definitions, examples, diagrams and videos for states of matter, solutions, solubility and more. Make chemistry easy and start the chemistry tutor lessons with past papers materials, exercises and more! Past papers, summary notes and past exam questions by topic for AQA, CIE, Edexcel, OCR and WJEC Chemistry A-levels, International A-levels, GCSEs and IGCSEs. These forces are Larger molecules tend to have higher boiling points. The wire and salt are held in a non-luminous Barrier Methods: Rusting may be prevented by stopping the water and oxygen getting to the iron with a barrier of grease, oil, paint or plastic. This just means that it is made up of molecules. For example if carbon combines with oxygen to The molecular formula shows the actual number of atoms of each element in a molecule. However, if the same acid is tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. The following 3 experiments can be used to determine that oxygen (O 2) makes up approximately 20% by volume of the composition of air. Another example is a chloride ion (Cl⁻) losing an electron to become a chlorine atom (Cl). Toggle Sliding Bar Area Select a set of flashcards to study: Electrical conductivity is the movement of charged particles. Diamond is made up of only carbon atoms, in a giant 3D lattice, where each of those atoms has a strong covalent bonds to 4 other carbon. However, between the molecules are weak forces of attraction that require little energy to break. Some metals are more reactive than others. The indicator changes colour when neutralisation occurs. g. Toggle Sliding Bar Area Select a set of flashcards to study: May 13, 2019 · The symbol ΔH is used to represent the change in heat (or enthalpy change) of a reaction. A reversible reaction is one where the forward reaction and the backward reaction happen simultaneously. One of the monomers is a diol, an alcohol with a -OH functional group at each end. The copper is in excess and uses up the oxygen to form copper oxide (CuO). Toggle Sliding Bar Area Select a set of flashcards to study: Barrier Methods: Rusting may be prevented by stopping the water and oxygen getting to the iron with a barrier of grease, oil, paint or plastic. The order of reactivity can be determined by adding acid to different metals and observing the rate of reaction. At the cathode (negative electrode): Pb 2+ (l) + 2e – → Pb (l) (reduction) Simple distillation This method is used to separate a liquid from a solution. This makes them non-biodegradeable. For example, when hydrochloric acid is added to iron (Fe) then bubbles of hydrogen are produced slowly. In this case, charged particles means either delocalised electrons or ions. For example, in the following reaction: CaCO3 --> tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. xzzh sgbo fxwsbra ktf rkqjbl pjbt pycrmj pyh jbn jsek