2018年北京市西城区高中化学合格考模拟练习(二)试卷与 答案

······2分2)+725······································2分3)NaOH>Mg(OH)2>Al(OH)3·····························2分4)共价·······································2分9······························2分6.(8分)(1)光的散射?····································2分2)FeCl3·······································2分3)d·········································2分4)分散质的离子很小,对可见光的散射作用很微弱············2分7.(8分)(1)①第3周期第VⅠA族·····························2分②b······································2分催化剂4NO+6H2O···················2(2)①4NH3+5O2分△②2.4······································2分8.(10分)(1)不是······································2分2)硫酸钡或BaSO4·······························2分3)除去挥发出来的Br2,防止干扰实验····················2分4)取少量颜色变化前的B中溶液于试管中,加热,将气体通入品红溶液中,品红溶液褪色·······················2分5)H2O2>Br2>SO2·······························2分10