《高一化学必修一氧二化硫》由会员分享，可在线阅读，更多相关《高一化学必修一氧二化硫（23页珍藏版）》请在金锄头文库上搜索。
1、二氧化硫 SO2湘潭市一中高一化学备课组Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.重点城市空气质量日报日期：2009-10-19城市污染指数首要污染物空气质 量级别空气质 量状况北京
2、88可吸入颗粒物良 天津78二氧化硫良 石家 庄81可吸入颗粒物良 秦皇 岛66二氧化硫良 太原105二氧化硫1轻微污 染 你对SO2知多少 ? 为什么要选择这 污染物的指数来 报告?Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 200
3、4-2011 Aspose Pty Ltd.摄于1968年摄于1908年Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.酸雨对环境有哪些危害？酸雨是由什么引起的呢？Evaluation o
4、nly.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.有毒食品毒发事件豆笋用硫磺、二氧化硫处理过粉丝以化肥及二氧化硫漂白银耳用硫磺熏蒸，使银耳变白近年来市场上陆陆续续发现有毒食品。Evaluation only.Eva
5、luation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.S在空气中燃烧：S + O2SO2点燃硫(硫黄):黄色粉末二氧化硫是怎样产生的?大量的SO2是 含硫的矿物燃 料燃烧产生的Evaluation only.Evaluation o
6、nly. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.颜色状态毒 性气 味强烈的刺激性气味 有 毒 密 度溶解性沸 点无色气体 比空气密度大 容易液化 易溶于水 二氧化硫是一种无色、有刺激性气味、有毒、比空气重、容易液化、易溶于水的气体。一、二氧化硫
7、的物理性质：Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.思考从组成上看：SO2一种非金属氧化物, 非金属氧化物有很多是酸性氧化物, 请设计实验证明是SO2酸性氧化物？与碱性氧化物反应生
8、成盐与H2O反应生成酸 酸性氧化物与碱反应生成盐和水二氧化硫的化学性质Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.探究结论：SO2溶于溶液呈酸性SO2 + H2O = H2SO3亚硫酸
9、易分解 ： SO2 + H2O正反应逆反应H2SO3在相同条件下, 既能向正反应进行, 同时又能向逆反应方向进行的化学反应。可逆反应：H2SO3 = SO2 + H2O Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011
10、Aspose Pty Ltd.问题讨论我们学过的哪些反应是可逆反应？H2 燃烧生成水, 水通电时生成氢气和氧气, 是可逆反应吗？反应条件不同, 不是可逆反应。 CO2 + H2O H2CO3Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright
11、2004-2011 Aspose Pty Ltd.练习写出SO2与水、NaOH溶液的反应方程式。二、SO2的化学性质：1. SO2具有酸性氧化物的通性SO2 + H2O = H2SO3SO2 + 2NaOH = Na2SO3+H2OEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspo
12、se Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.实验步骤现象结论往装有SO2溶液的试管 内滴入2-3滴品红溶液, 加热试管内褪色的液体品红溶 液褪色溶液变 回红色SO2有漂 白作用SO2漂白所 生成的物质 不稳定, 受 热恢复原色二氧化硫的漂白性科学探究Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile
13、5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.物质现象反应原理漂白效果活性炭Na2O2 氯水SO2吸附作用强氧化性与有色物质 结合成不稳 定无色物质暂时性品红褪色 加热不变品红褪色 加热不变品红褪色 加热恢复 原来颜色几种不同物质漂白性比较永久性永久性非氧化性Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspos
14、e.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.S S S(SO2) S-2 0 +4 +6二氧化硫的化学性质根据SO2中S的化合价推断它具有怎样的性质？思考？Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .
15、NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.表现还原性, 需加入 剂来实现, 如 。表现氧化性, 需加入 剂来实现, 如 。SO2S+6S0氧化还原SO2 + 2H2S = 3S+ 2H2O2SO2O2 = 2SO3 催化剂二氧化硫的化学性质+4Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.SOSO2 2的还原性的还原性思考思考: SO: SO2 2能使溴水、能使溴水、KMnOKMnO4 4褪色褪色 是是SOSO2 2的漂白性吗？的漂白性吗？a. a.与溴水反应：与溴水反应：SOSO2 2+Br+Br2 2+2H+2H2 2
