By Christopher Talbot
Offer transparent assistance to the 2014 alterations and make sure in-depth examine with available content material, at once mapped to the hot syllabus and method of studying This moment variation of the highly-regarded first version includes all SL and HL content material, that's in actual fact pointed out all through. strategies can be found loose on-line, besides appendices and knowledge and statistics. - enhance examination functionality, with exam-style questions, together with from previous papers - combine idea of data into your classes and supply possibilities for cross-curriculum research - Stretch extra capable scholars with extension actions - The shift to concept-based method of studying , Nature of technology, is roofed by means of offering a framework for the direction with issues for dialogue - Key talents and experiments integrated - complete electronic package deal - provided in a number of codecs that you should bring the path simply the way you like!
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Additional info for Chemistry for the Ib Diploma
Gases are very compressible because of the large interatomic or intermolecular spaces between the particles. This also causes the density of gases to be very low compared to those of solids and liquids. 50): the pressure of the gas increases as the volume decreases. The temperature remains constant during this change (if it is performed slowly, so that the air can remain in temperature equilibrium with the syringe and the surroundings). 50 A syringe of air connected to a pressure gauge The increase in the pressure of the gas is due to the increase in the frequency of collisions between the gas particles and the container walls.
Half equations are used to describe redox reactions. These reactions involve the transfer of electrons (Chapter 9). For example, if molten sodium chloride is electrolysed then the mole ratio of sodium atoms to chlorine molecules is 2 : 1. 2 mol of sodium ions accept 2 mol of electrons to form 2 mol of sodium atoms: 2Na+ + 2e– → 2Na 2 mol of chloride ions release 2 mol of electrons to form 1 mol of chlorine molecules: 2Cl– → Cl2 + 2e– A mole of electrons is known as a Faraday. 1 Faraday or 1 mole of electrons carries a charge of 96 500 coulombs (C).
The Italian chemist Avogadro explained Gay-Lussac’s results by suggesting that equal volumes of gases, measured at the same temperature and pressure, contain the same number of molecules. This suggestion is now called Avogadro’s law. 43 Molecular models showing the reaction between hydrogen and chlorine V∝n where V represents the volume of gas and n represents the amount of gas (in moles). For example, if the number of molecules of a mass of gas is doubled, then the volume (at constant temperature and pressure) of the gas is doubled.
Chemistry for the Ib Diploma by Christopher Talbot