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约找到 3027 条结果,耗时 0.198 秒
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发表于
核技术与核仪器
动手实践: 实验报导
内容:材料准备1-1:闪烁体探头- 碘化
钠
闪烁体,新,30x25mm,参考价格300~500RMB- 光电倍增管,1977年生产,GDB-35型。
碘化
钠
加次氯酸
钠
会使淀粉变蓝,继续加次氯酸
钠
蓝色消失
轻疯科研中心
14年6个月前
发表于
化学
第一步我想应该是2NaI + NaClO + H2O == I2↓ + NaCl + 2NaOH离子方程式:2I- + 2ClO- + H2O == I2↓ + Cl- + 2OH-第二步我猜可能是ClO-进一步氧化I2,不过写了半天没写出来,请指点指点,谢谢
亚硫酸
钠
_亚硫酸氢
钠
法精制TNT工艺
虎哥
5年2个月前
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高氯酸
钠
和高氯酸钾的性质差别大吗?
菜菜菜鸟
15年9个月前
发表于
化学
内容:今天下午去逛了一下店,问了好几家,结果最后一家说有高氯酸
钠
,没高氯酸钾[s:245] 更晕的是年代久远(05年的),他都忘了价格是多少了,于是就随便给了40[s:94] ,好像赚了哦……嘿嘿…… 个人觉得应该是化学性质差别不大
钾
钠
合金
新黑火药
16年2个月前
发表于
化学
RT
【分享实验】锂,
钠
,钾,钙分别于乙醇的反应证明其金属性谁更强!
氰化铊
13年8个月前
发表于
化学
内容:Na与乙醇反应:将Na投进乙醇中,由于
钠
的密度大于乙醇的密度,
钠
进入乙醇后首先会沉到试管底部!,
钠
与乙醇接触立即产生大量的小气泡,由于密度的关系,
钠
不会像锂那样漂浮在液面上而是沉在液面下面,随着
钠
不断的产生小气泡,
钠
自身也不断的消耗体积,最后由于
钠
的体积减小,产生的小气泡把
钠
托到乙醇液面上反应,这是
钠
虽然漂浮在液面上
丙戊酸
钠
的合成
性感铷铷
6年4个月前
发表于
化学
一种抗癫痫药,合成路线是丙二酸二乙酯烃化,脱羧,成 盐
[实验展示] [原创] 不用稀硫酸(或者盐酸)制取氢气的实验——使用硫酸氢
钠
溶液代替稀硫酸
TBsoft
9年10个月前
发表于
化学
内容:硫酸氢
钠
(NaHSO4)或者焦硫酸
钠
(Na2S2O7)常在分析化学中作为熔解某些矿石的一种酸性熔剂,其中焦硫酸
钠
更为常用,焦硫酸
钠
溶于水亦生成硫酸氢
钠
: Na2S2O7+H2O=2NaHSO4 因此二者的水溶液均可作为硫酸氢
钠
水溶液看待,,即相当于硫酸氢
钠
水溶液,或者说硫酸氢
钠
水溶液的性质与硫酸
钠
—硫酸混合水溶液的性质相同,在硫酸
钠
对反应没有干扰的情况下,硫酸氢
钠
水溶液即可代替稀硫酸使用。,作为熔矿剂,焦硫酸
钠
试剂更容易买到,笔者购买了焦硫酸
钠
试剂,为打碎的大块熔块,将较大的熔块进一步研碎,称取33g—44g焦硫酸
钠
置于小烧杯中,倒入约60ml水,微热并充分搅拌,直到焦硫酸
钠
完全溶解(焦硫酸
钠
易溶于水,固体硫酸氢
钠
或者焦硫酸
钠
试剂的潜在危险性,相对硫酸、盐酸等强酸液体试剂也要小一些。,3、硫酸氢
钠
溶液浓度不宜太高,否则反应一段时间后容易析出较多的硫酸
钠
晶体,反而影响锌粒与硫酸氢
钠
溶液的接触,进而影响反应速度。
看看老外是咋样用镁与氢氧化
钠
制取
钠
的
1996615xp
10年0个月前
发表于
化学
This is one way sodium metal can be isolated using NaOH and Mg. Mg has a strong enough desire for oxygen to tear it from the NaOH, leaving ingots of elemental sodium behind. 付上视频 https://www.youtube....
【实验】
钠
钾合金
pound_tatp
14年1个月前
发表于
化学
过饱和乙酸
钠
wnlixuyang
13年7个月前
发表于
化学
新人~~~~~弄的不多,半烧杯的溶液。杯具的表面皿不小心给摔碎了~ 我就只好拿了一张A4纸来盖。效果不太好,从冰箱里拿出来,一揭开A4纸立刻就析出。本来想用手来点的- -就这样吧!点击此处查看视频
文献:碘化
钠
(Tl)单晶的生长
RodTech
9年11个月前
发表于
化学
核技术与核仪器
最近从淘宝上买来大大小小一些这种晶体,可是最大的不过50mm直径,对于探测空气中gamma还是小了,妄想着自己长一个,可是看了这文章,有点复杂,遂放弃了,若是谁有经验的,还请赐教如何在业余条件长个比较靠谱的单晶。
苯甲酸
钠
发动机
自由万岁
16年0个月前
发表于
喷气推进
有谁做过啊给点经验今天备料做了一个有点像驴叫但没飞起来估计是压药问题明天继续试验
【参赛】“雷神之心”———氯化
钠
晶体
zx-48750
4年3个月前
发表于
晶体养成所
由于信息敏感,近期水表,本人已经删除
闲的没事用电弧电解氯化
钠
...可以看到小
钠
粒的黄色火星
storm
13年11个月前
发表于
化学
谁知道液态化学品(如硫酸,氢氧化
钠
等等)在水中的扩散速度?
thl0408
15年10个月前
发表于
化学
内容:比如我往一河段里倒氢氧化
钠
那多久后此河段里的水全变为碱性(或PH值生高)顺便问个事就是我如果把硫酸装好(安全的装好)拿去给快递只和他说是宜碎品他回运吗就是直接自己包装让后他运可以吗?
【实验】
钠
钾合金
pound_tatp
14年1个月前
回复于
化学
回 36楼(氯化
钠
) 的帖子
普利子蛋
12年7个月前
回复于
机械与工具
牛气 撞击行程 都可以?
[科创基金2022H6]探究无钯情况下次磷酸
钠
作为还原剂制备鲁米诺的可行性 结题报告
2SC1970
2年4个月前
发表于
化学
动手实践: 实验报导
内容:【实验目的】探究无钯情况下次磷酸
钠
作为还原剂制备鲁米诺的可行性【实验步骤】1. 3-硝基邻苯二甲酰肼的制备取25g 3-硝基邻苯二甲酸、18g N2H5HSO4、23g无水醋酸
钠
于500ml,底物溶于氢氧化
钠
溶液有明显的橙色(浓度极低时为亮黄色),产物溶于氢氧化
钠
基本无色,如图: 底物和鲁米诺溶于氢氧化
钠
后在铁氰化钾-H2O2条件下均能发出持续时间较短的蓝白色光芒,但将试样溶于DMSO中,加入,硝基邻苯二甲酰肼在实验条件下还原,结果如表:(由于需双手戴手套操作,无法拍照,请谅解)【实验结论】所有组中得到的产物,其发光试验的现象都符合3-硝基邻苯二甲酰肼而不符合鲁米诺,证明得到的物质中不含鲁米诺或鲁米诺含量极低,证明次磷酸
钠
在无钯催化的条件下用于还原
【实验】
钠
在水中的反应
449095600
14年1个月前
发表于
化学
第一次发实验[s:108] 很粗糙相机没内存了一手拿着相机一手做实验没对焦好点击此处查看视频
关于四羟基和铜酸
钠
ltc
14年3个月前
发表于
化学
有反应2NaOH+Cu(OH)2=Na[Cu(OH)4]那CuO能与NaOH反应吗
硫酸
钠
和木炭反应生成硫化
钠
这个反应需要多高的温度 喷灯能搞定吗
消失
15年11个月前
发表于
化学
RT [s:94] [s:258] [s:261]
出售50*30mm碘化
钠
(铊)闪烁体
已注销用户
5年0个月前
发表于
跳蚤市场
NaI(Tl)闪烁体,带有通孔,略有瑕疵,但是能用。晶体由于保存时温差变化出现一轻微裂痕,使部分耦合硅油渗入导致玻璃窗出现一气泡,玻璃窗完好不影响使用。已出封贴
8块一瓶的亚硫酸
钠
价格如何?
彼岸江山
15年10个月前
发表于
跳蚤市场
今天下午在商贸城的入口不远处买到的,除了制SO2外还有何用??
出 闪烁体(碘化
钠
)一套(进口)
RodTech
8年7个月前
发表于
跳蚤市场
用途见帖子:XXXXXXXXXXXXXXXXXXXXXXXX/t/79080Saint-Gobain公司32mm直径,50mm高度,井形探测器,样品放在孔内,周围包裹闪烁体,达到最佳效率测试工作完全正常,含闪烁体,光电倍增管,分压与信号引出座,送前放板一个,提供接线图。井形,效率最高,极难加工,罕见。一套1200顺丰到付,alipay先款。淘宝单卖该型闪烁体,价格2800。
24块买了250G
钠
,这价格如何???
atlas
16年7个月前
发表于
跳蚤市场
RT
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