chemistry 0.0 / 5 ? ChemistryhalogensA2/A-levelOCR Created by: pxnxCreated on: 08-05-19 16:00 What are Halogens? 7 electrons in the outer shell. most reactive of non-metals. naturally found as compound. 1 of 16 what forms when you add (water+cyclohexane) to chlorine? top layer-dark green bottom layer-light green 2 of 16 what forms when you add (water+cyclohexane) to Bromine? top layer-orange bottom layer- yellow 3 of 16 what forms when you add (water+cyclohexane) to iodine? top layer-pink bottom layer-yellow 4 of 16 what are the qualities of Flourine? most oxidising agent. less shielding in flourine. flourin gains an electron more readily 5 of 16 what are the features of the anode? oxidation, positive, anions to anode, -x--->x+-e 6 of 16 what is the features of the cathode? reduction, gain electrons, +M + e---->M, negative 7 of 16 what is the dynamic equilibrium? conc. remains constant,has to be in a closed system, reverse+forward both happening 8 of 16 Kc>1 more products than reactants at equilibrium 9 of 16 Kc< 1 more reactants than products at equilibrium 10 of 16 Kc>>1 greater than 10(10), reaction has gone to completion. 11 of 16 Kc less than 10(10), reaction hasnt happened. 12 of 16 what is the expression of Kc? aA+bB⇌cC+dD 13 of 16 what can change the value of Kc? change in temperature 14 of 16 what are the dangers of chlorine? Irritates eyes,skin+lungs. toxic to humans. forms gas which can be easily inhaled 15 of 16 what is chlorination? chlorine in water to kill bacteria and other pathogens 16 of 16
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