祝愿树几点出暴风雪旅人几率大

来源：蜘蛛抓取(WebSpider) 时间：2015-05-27 02:08 标签： 暴风雪旅人
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domain at the following WHOIS server:萝莉幼幼,拍摄现场的潮喷
黄色女人裸体,,！
看到程一春风
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友情链接：版权所有 豫ICP备号技术支持：名水网络工作室 QQ：
果博友情连接:根据样品加水溶解得到无色溶液,可推出样品中一定没有硫酸铜,再根据无色溶液加氢氧化钠溶液得到白色沉淀,则沉淀一定为氢氧化镁,即样品中一定有氯化镁,滤液中加硝酸银产生的沉淀为氯化银沉淀.
解:根据无色溶液及白色沉淀,则可推出一定没有硫酸铜,一定有氯化镁,则样品的成分可能为氯化钠,氯化镁;氯化镁,硝酸钠;氯化镁,氯化钠,硝酸钠;故答案为:与;与;,与;根据水和盐类化合物的溶液的凝固点可知,在雪中加入盐类化合物使混合物的凝固点降低,可使雪较快融化,故答案为:使混合物的凝固点降低;因,溶于水导致土壤溶液浓度大于细胞液浓度,此时导致植物因细胞失水而枯萎,则可先除去部分雪少使用融雪剂,故答案为:先铲除部分雪后再用融雪剂.
本题以融雪剂成分的探究和使用为切入点来考查了融雪剂的成分的推断,作用及盐的用途,学生应熟悉物质的颜色,物质之间的反应,常见盐的用途等来解答此类推断题.
1112@@3@@@@物质的鉴别、推断@@@@@@105@@Chemistry@@Junior@@$105@@2@@@@化学物质的多样性@@@@@@15@@Chemistry@@Junior@@$15@@1@@@@物质构成的奥秘@@@@@@2@@Chemistry@@Junior@@$2@@0@@@@初中化学@@@@@@-1@@Chemistry@@Junior@@$1083@@3@@@@常用盐的用途@@@@@@104@@Chemistry@@Junior@@$104@@2@@@@生活中的常见化合物@@@@@@14@@Chemistry@@Junior@@$14@@1@@@@身边的化学物质@@@@@@2@@Chemistry@@Junior@@$2@@0@@@@初中化学@@@@@@-1@@Chemistry@@Junior@@
@@15@@2##@@14@@2
求解答 学习搜索引擎 | 2008年春节前,我国南方地区遭遇历史上罕见的特大暴风雪,给这些地区造成重大经济损失.为尽快除雪,恢复交通,人们使用了融雪剂.现有某公司生产的融雪剂,其成分是可能是由氯化钠,氯化镁,硫酸铜,硝酸钠中的两种或两种以上的物质组成.一兴趣小组为探究其成分设计并完成了以下实验:(1).根据上述实验推断该融雪剂组成可能是\textcircled{1}___;\textcircled{2}____;\textcircled{3}___.(2).融雪剂除雪的化学原理是___.(3).但在除雪后,一些树木出现枯死现象.由此你对使用融雪剂有何建议:___(答一点即可)- 多彩家园
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