初中化学-酸碱盐复习课.ppt

初中化学Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 酸碱盐复习课 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 一、酸性溶液和碱性碱性 溶液 知识要点： 1.溶液的酸碱性 化学家(波义尔与鲜花) 指示剂(石蕊、酚酞) pH-溶液酸碱性的强弱程度 PH的范围 0-14 PH测试方法 玻璃棒蘸取与比色卡对照 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2.常用物质的酸碱性及pH 胃液(0.81.5)、酸雨(5.6)、血液(7.35 7.45) 肥皂水 洗涤剂、海水、洗发精、 护发素、纯碱、草木灰、橘汁、维生素C 、 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 重点题型： 1.用pH试纸测定食用“白醋”的酸碱度，如果先将pH试纸润湿后 ，再把白醋滴在pH试纸上，则测得的“pH“与白醋实际的pH比 较（ ） A.偏大 B.偏小 C.相等 D.不能确定 2.下列各组物质反应后，产生的气体能使紫色石蕊试液变红的是 （ ） A.Zn和稀H2SO4 B.KClO3和MnO2 C.CaCO3和稀盐酸 D.Mg和盐稀盐酸 3.某硫酸溶液的pH为3，加入下列一种液体混合后，会使pH小于3 的是（ ） A.蒸馏水 B.pH=10的稀硫酸 C.氢氧化钠溶液 D.pH=0的稀硫酸 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 4.溶液酸碱度对头发的影响： 在不同pH溶液中浸过后 pH=1pH=4pH=7pH=10pH=13 观察各束头发的光 泽 无有有无无 分别取一根头发， 用两手拉直至拉断， 记当拉断的难易程度 易不不易易 讨论：溶液的酸碱度对头发有什么影响？对你选择洗发液有什么启示？ (1)收集一些刚剪下未经任何处理的头发样品（可以去理发店收集），分成 5份，分别用线系成一小束。 (2)将5束头发分别放进盛有不同pH溶液的小烧杯中，静置约30min。 (3)将5呼束头发取出，用纸巾吸干液体后进行观察和实验。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 二、常见的酸碱 浓盐酸 浓硫酸 通 常 状 况 颜色无色无色 状态液态液态粘稠油状 气味强烈刺激性气味无气味 标况密度1.19g/cm3(37%)1.84g/cm3(98%) 敞口放置有白雾生成吸收水蒸气 知识要点： 1.浓盐酸与浓硫酸性质 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2.浓硫酸的特性 (1)吸水性：能吸收空气中的水蒸 气可做干燥剂。 溶于水时放出大量热， 稀释时切不可将水倒入浓硫酸中。 (2)脱水性：能使纸张、衣物炭化， 腐蚀皮肤衣物。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 3.稀盐酸与稀硫酸的化学 性质 现 象化学方程式 金属： 锌粒、镁带 铁片 有气泡产生，镁反应剧 烈 ；铁反应较 慢，溶液浅绿 Zn+H2SO4=ZnSO4+H2 Fe+2HCl=FeCl2+H2 金属氧化物： 铁锈 生成黄色溶液Fe2O3+3H2SO4=Fe2(SO4)3+3H2O 碳酸盐： 石灰石、纯碱 与盐酸反应快，产生气体 与硫酸反应气泡少，很快 停止 CaCO3+2HCl=CaCl2+H2O+CO2 CaCO3+H2SO4=CaSO4+H2O+CO2 硝酸银 钡盐 有白色沉淀 AgNO3+HCl=AgCl +HNO3 Ba(NO3)2+H2SO4=BaSO4+2HNO3 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 4、酸的应用 用途：除锈、精炼石油、制盐 常见含酸的物质：汽水、胃液、食醋、 酸奶、蓄电池 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 5、.氢氧化钠与氢氧化钙、氨水的物理性 质。 氢氧化钠氢氧化钙氨 水 通常 状况 状况固体粉末状固体溶液 颜色白色白色无 气味无无 强烈刺激性氨 臭气味 溶解性易溶、放热微溶易溶 露置空气中 表面潮解、吸 水 稍吸水挥发 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 6.NaOH的特性 (1)吸水性：在空气中吸收水蒸气潮解， 可作干燥剂。但不能用来干燥CO2等酸性 气体。 (2)吸收CO2：吸收空气中CO2变质。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 7、NaOH溶液、Ca(OH)2溶液的化学 性质 与CO2反应2NaOH+CO2=Na2CO3+H2O Ca(OH)2+CO2=CaCO3+H2O 与CuSO4反 应 2NaOH+CuSO4=Cu(OH)2+Na2SO4 Ca(OH)2+CuSO4=Cu(OH)2+CaSO4 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 9 浓硫酸和氢氧化钠有很强的腐蚀性，对含 蛋白质和纤维素的物质具有很强的破坏 作用，所以不能用手和皮肤接触浓硫酸 和氢氧化钠。氢氧化钠又称为烧碱、火 碱、苛性钠。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 10 气体中常含有水蒸气，可用具有吸水性的 物质干燥，如浓硫酸、氢氧化钠等。用 浓硫酸可以干燥O2、CO2、H2、SO2等气 体，但不能干燥NH3。用氢氧化钠可以干 燥O2、H2、NH3等，但不能干燥CO2、 SO2、H2S等。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 酸和碱的反应 酸碱盐 涵 义 电离出的阳离子全部是 氢离子的物质叫做酸 电离出的阴离子全部 都是氢氧根离子的物 质叫做碱 能电离出金属离子和酸 根离子的物质叫做盐 化学 性质 酸+活废金属盐+氢 气 酸+金属氧化物盐+ 水 酸+碱盐+水 酸+盐新酸+新盐 碱+非金属氧化物 盐+水 碱+酸盐+水 碱+盐新碱+新盐 盐+金属新盐+新金 属气 盐+酸新盐+新酸 盐+碱新盐+新碱 盐 1+盐2新盐1+新盐2 与石 蕊试 液 pH7 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 重点题型： 1.分别盛有浓硫酸和浓盐酸的两个试剂瓶，敞口放置一段时间 后（不考虑水分的蒸发），则两瓶溶液的（ ） A.质量都变小了 B.溶质的质量分数都变大了 C.体积都变小 D.溶质的质量分数都变小了 2.在焊接金属前，常先用稀盐酸处理焊接处，其主要原理可表 示为：（ ） A. Fe+2HCl=FeCl2+H2 B. Fe2O3+6HCl=2FeCl3+3H2O. C.Fe2O3+3H2SO4=Fe2(SO4)3+3H2O. D.Fe(OH)3+3HCl=FeCl3+3H2O. 3.试写出由H、N、O、S、Na五种元素中的两种或三种所组成的 物质的化学式。 (1)两种酸 ； (2)常见的碱 。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 4氧化铜是一种黑色固体，可溶于稀硫酸。某同学想知道是稀硫 酸中的哪种粒子（H20、H+、SO42-）能使氧化铜溶解。请你和他一 起通过下图、三个实验完成这次探究活动。 （1）你提出的假设是 。 （2）通过实验可以证明 。 （3）要证明另外两种粒子能否溶解 氧化铜，还需要进行实验和， 在中应该加 入 。 （4）探究结果为 。 你认为除实验和所用试剂外，还能够溶解氧化铜的常见物质有 。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. (1)若装置A的质量增加，B的质量不变，则试验是 。 (2)若装置A的质量不就，B的质量增加，则试验气是 。 (3)若装置A和B的质量都增加，则试验气是 。若A 的质量增加54g，则B的质量增加 。 5.为了确定CH4、H2、CO三种可燃性气体（简称试验气），可分 别将它们在氧气中燃烧，把生成的气体依次通过A（浓硫酸）、 B（氢氧化钠溶液）两个洗气瓶。如图7-11所示回答下列问题： Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 6.(1)将一小块金属钠投入盛有适量水的烧 杯中，剧烈反应，生成氢气；(2)向(1)反 应后的溶液中滴加硫酸铜溶液，有蓝色 沉淀生成。写出实验(1)、(2)中有关的化 学方程式： Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 7.向50g质量分数为14.6%的盐酸中，加入 一定量20%的氢氧化钠溶液恰好完全中 和。求所得溶液中溶质的质量分数。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 物质溶解性口诀 钾（K+）钠(Na+)铵(NH4)硝(NO3)均可溶 氯化物(Cl)不溶只有氯化银(AgCl) 硫酸盐(SO4)不溶只有硫酸钡(Ba SO4) 碳酸盐镁(MgCO3)微余不溶 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 酸碱盐性质 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 酸的通性（盐酸、硫酸、硝酸） 跟指示剂的反应，使石蕊变红，酚酞不变色 跟金属的反应可生成氢气 跟金属氧化物（酸性氧化物）的反应，生成盐和水 跟碱的反应生成盐和水 跟某些盐的反应生成另酸和另盐 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 碱的通性（氢氧化钠、氢氧化钙 ） 能跟酸碱指示剂起反应，使石蕊变蓝，酚酞变红 能跟多数非金属氧化物起反应，生成盐和水 能跟酸起中和反应，生成盐和水 能跟某些盐起反应，生成另一种盐和另一种碱 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 盐的性质（氯化钠、硫酸铜、碳酸钠 ） 能跟酸起反应，生成另盐和另酸 能跟酸起反应，生成另盐和另碱 能跟金属起反应，生成另盐和另金属 能跟某些盐起反应，生成另二盐 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 复分解反应发生的条件 Cu(OH)2 + 2HCl = CuCl2 + 2H2O HCl + AgNO3 = AgCl + HNO3 CaCO3+2HCl=CaCl2+H2O+CO2 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 练习 1下列各组物质，属于同一种物质的是（ ） A冰、干冰 B烧碱、纯碱 C蓝矾、胆矾 D生石灰、熟石灰 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 2现有石灰石、生石灰、盐酸、氢氧化钠溶液、硫酸 铜溶液、水、铁屑，从中选取适当的物质完成下列反 应的化学方程式： （1）有沉淀生成的复分解反应： ， （2）有气体生成的复分解反应： ， （3）有气体生成的置换反应： ， （4）有固体生成的置换反应： ， （5）中和反应： ， （6）化合反应： ， （7）分解反应： 。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 3用相关的化学方程式回答下列问题： （1）有人误食氯化钡而引起中毒，若及时服用 硫酸钠溶液可以解毒，原因是 ，若及时服用 碳酸钠溶液是否可以解毒 （填“能”或“不能”）， 原因是 、 。 （2）食盐水中滴加硝酸银溶液，观察到的现象 是 ，其反应的化学方程式为： 。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 4.现有铁、稀硫酸、氯化铜溶液、氢氧化钠溶液和氧 化铜粉末，两两混合后，能发生反应的，写出有关的 化学方程式。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 5. 写出用石灰石、碳酸钠和水做原料制备氢氧化钠 的各步反应的化学方程式。 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 应用Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 性质决定用途 许多盐都有毒,防止混入食物中 钡盐(Ba2+)铜盐 (Cu2+) 亚硝酸盐(NO2-) 有毒 注意 酸-除锈、制造化肥等 碱-改良酸性土壤、制漂白粉、用 于建筑业 盐- 用途广泛 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 化肥 氮肥(铵盐,氨水,尿素) 磷肥 钾肥 复合肥 微量元素肥 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 什么是化肥？ Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 氮 肥 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 种 类 碳酸氢铵 硫酸铵 氯化铵 硝酸铵 硝酸钾 尿素 氨水NH3H2O（20%） NH4HCO3（17%） (NH4)2SO4（21%） NH4Cl（25%） NH4NO3 KNO3 CO(NH2)2（46%） 液态氮肥 有机氮肥 硝态氮肥 铵态氮肥 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 缺 氮 肥 雷雨发庄稼 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 一位农民在70年代刚使用化肥时，生产队里种 黄豆，为确保增产，施用了大量尿素。 夏天时，黄豆 苗生长非常旺盛，农民很高兴。结果，到了秋天，黄 豆的结实率很低。相反，漏掉施尿素的地方，黄豆结 实却较丰厚，令人哭笑不得。你认为这位农民的问题 出在哪儿？ Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 磷 肥 根 果实 抗寒 抗旱 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 磷肥的种类 磷矿粉 (主要成份Ca3(PO4)2) Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 钾 肥 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 钾肥种类 氯化钾：KCl 硫酸钾：K2SO4、 碳酸钾：K2CO3 、 （草木灰的主要成分） Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 缺钾肥 如果农作物即缺钾肥、又缺氮肥应该施那种肥？ Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 复合肥 硝酸钾KNO3 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd. 我们该如何储存和使用化肥呢？ Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile .Cr