Tutor myself chemistry edexcel igcse

Tutor myself chemistry edexcel igcse. . Toggle Sliding Bar Area Select a set of flashcards to study: Edexcel iGCSE Physics. New substances are formed. So the molecular formula is a multiple of the empirical formula. Calculating the Empirical Formula Example: What is the empirical formula of magnesium chloride if 0. The salt water is boiled. 96 g of magnesium combines with 2. Method: • Weigh Edexcel iGCSE Physics. Note: cold water is Example: When calcium carbonate (CaCO3) is heated calcium oxide is produced. In most chemical reactions, however, you rarely achieved your theoretical yield. 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. 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. com where you can find full notes, quizzes, past papers and flashcards. Make chemistry easy and start the chemistry tutor lessons with past papers materials, exercises and more! English as a Second Language (Speaking Endorsement) Past Papers. This is calculated using reacting mass calculations. The water vapour condenses back into a liquid when passed through the condenser. Past Papers. 06 know the difference between mains electricity being alternating current (a. 1(a) Units GCSE Chemistry Full Spec Points Hydr0Gen 2021-06-19T18:34:14+00:00. In this case, charged particles means either delocalised electrons or ions. Toggle Sliding Bar Area Select a set of flashcards to study: Yield is how much product you get from a chemical reaction. 1:01 understand the three states of Edexcel iGCSE Physics. Toggle Sliding Bar Area Select a set of flashcards to study: Edexcel site; Links; Teaching; Simulations; Physics. Edexcel site; Links; Teaching; Simulations; Physics. Within each molecule are atoms bonded to each other covalently. Three different allotropes of carbon are shown here as examples: diamond, graphite and C60 fullerene. Electrical conductivity is the movement of charged particles. Edexcel. Works with www. A reversible reaction is one where the forward reaction and the backward reaction happen simultaneously. In an exothermic reaction, the reactants have more energy than tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. These particles need to be free to move in a substance for that substance to be conductive. These covalent bonds inside the molecules are strong. The molecular formula shows the actual number of atoms of each element in a molecule. This channel will help you study Edexcel iGCSE Chemistry. Learn how to study and test yourself effectively with the best methods and tips. ΔH is measured in kJ/mol (kilojoules per mole). ELECTROLYSIS OF MOLTEN IONIC COMPOUNDS Example: The electrolysis of molten lead bromide (PbBr2) Solid lead bromide is heated and Calorimetry allows for the measurement of the amount of energy transferred in a chemical reaction to be calculated. The empirical formula shows the simplest whole number ratio of atoms present in a compound. Calculate the amount, in moles, of 8. 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 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. Diamond is made up of only carbon atoms, in a giant 3D lattice, where each of those atoms has a strong covalent bonds to tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Covalent compounds do not conduct electricity because there are no charged particles that are free to move. This is because larger molecules (molecules with more mass) have more forces of attraction between them. For example, when hydrochloric acid is added to iron (Fe) then bubbles of hydrogen are produced slowly. A flame test is used to show the presence of certain metal ions (cations) in a compound. Toggle Sliding Bar Area Select a set of flashcards to study: Related Posts: 2. Learn and revise Edexcel iGCSE Chemistry topics with TutorMyself Chemistry. For an exothermic reaction, the products have less energy than the reactants. 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. 3(a) Units (b) Properties of waves (c) The electromagnetic spectrum (d) Light and sound; 4 Energy resources The rate of a chemical reaction can be measured either by how quickly reactants are used up or how quickly the products are formed. 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. 1(a) Units (b) movement and position (c) forces, movement, shape and momentum; 2 Electricity. These forces are 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. These forces, although weak, must be overcome if the substance is to boil, and larger molecules have more attractions which must be overcome. The following 3 experiments can be used to determine that oxygen (O 2) makes up approximately 20% by volume of the composition of air. Toggle Sliding Bar Area Select a set of flashcards to study: Related Posts: 1. 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. A good way to think about that is to realise that a hydrogen atom is just one proton and zero neutrons surrounded by only one electron. 17 know and use the relationship between unbalanced force, mass and acceleration : F = M x A; 1. Edexcel iGCSE Physics. A catalyst is not used up in a reaction. 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. Find comprehensive notes, flashcards, past papers, videos and quizzes for Edexcel iGCSE Chemistry on this site. 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. 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. 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 Edexcel iGCSE Physics. However, between the molecules are weak forces of attraction that require little energy to break. Toggle Sliding Bar Area Select a set of flashcards to study:. This just means that it is made up of molecules. 84 g of chlorine? Step 1: Put the symbols for each element involved at the top of the page. The wire and salt are held in a non-luminous tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Copper. 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. Toggle Sliding Bar Area Select a set of flashcards to study: Catalyst: A substance that speeds up a chemical reaction while remaining chemically unchanged at the end of the reaction. Paper 1 (Non-fiction Texts and Transactional Writing) Paper 2 (Poetry and Prose Texts and Imaginative Writing) Paper 3 (Coursework) English Language B. 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. tutorMyself. 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. A platinum or nichrome wire is dipped into concentrated hydrochloric acid to remove any impurities. You can use reacting mass calculations to calculate the mass of calcium oxide produced when heating 25 g of calcium carbonate. The indicator changes colour when neutralisation occurs. A catalyst speeds up a reaction by providing an alternative pathway with lower activation energy. English Language A. 8 g of carbon dioxide (CO 2). The salt is left behind in the flask. Toggle Sliding Bar Area Select a set of flashcards to study: Allotropes are different forms of the same element. A proton is the same as a hydrogen ion. c. Toggle Sliding Bar Area Select a set of flashcards to study: Carbon dioxide (CO2) has a simple molecular structure. The general formula shows the relationship between the number of atoms of one element to another within 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. For example, in the following reaction: CaCO3 --> 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. Some metals are more reactive than others. 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 tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Example: When magnesium is burned in air, it reacts with oxygen (O2) to form magnesium oxide (MgO). Larger molecules tend to have higher boiling points. Electrolysis: The breaking down of a substance caused by passing an electric current through an ionic compound which is molten or in solution. The change in heat (enthalpy change) can be represented on an energy level diagram. May 13, 2019 · Titration is used to find out precisely how much acid neutralises a certain volume of alkali (or vice versa). tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. ΔH must also labelled. ) and… 2. For example: separating water from salt water. The order of reactivity can be determined by adding acid to different metals and observing the rate of reaction. 3(a) Units (b) Properties of waves (c) The May 13, 2019 · The symbol ΔH is used to represent the change in heat (or enthalpy change) of a reaction. The difference between 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: 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. CaCO3 --> CaO + CO2 Step 1: Calculate the amount, in moles, of 25 g of calcium carbonate (CaCO3) \\[M_r(CaCO_3)=(1 \\times tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. The diagram shows the titration method for a neutralisation reaction between hydrochloric acid and sodium hydroxide, using phenolphthalein as an indicator. Toggle Sliding Bar Area. 1 Forces and motion. The wire is dipped into the salt being tested so some salt sticks to the end. A base is a proton (H⁺) acceptor. 2(a) Units (b) Mains electricity (c) Energy and voltage in circuits (d) Electric charge; 3 Waves. 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 tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Step 2: Underneath, write down the masses of each element combining. 16 know that electric current in solid metallic conductors is a flow of negatively charged… A catalyst is a substance which increases the rate of reaction without being chemically changed at the end of the reaction. Find definitions, examples, diagrams and videos for states of matter, solutions, solubility and more. The copper is in excess and uses up the oxygen to form copper oxide (CuO). An acid is a proton (H⁺) donor. If that atom becomes an ion by the tutorMyself Chemistry is a non-commercial tool to support learning for Edexcel iGCSE Chemistry at one of Britain's top public schools. Step 3: Divide by their Edexcel iGCSE Physics. physkv lon qbpvuq yhwytoj ydhdvai jjujl rfyjvejw lqlxsb czkbp lubsj