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内容:蒸馏,等油温稳定后放入蒸馏烧瓶,开始时瓶内有NO2生产,等待1小时,几乎没有得到任何产物,于是开始提高温度到120℃,生成的NO2数量变多,溶液开始冒出小气泡,等待10小时候得到约5ml的蒸馏产物,取出
滴定
,可能是温度低的时候硝酸蒸发的量很少,相比之下分解的比较多,而温度提高后硝酸蒸发的量和分解的量比起来大很多所以蒸馏瓶内NO2浓度下降)等待半小时后得到50ml蒸馏产物,然后我妈电话来了- =,悲剧发生实验终止,取出少量产物
滴定
【实验】浓硫酸的提取
百死不悔
13年8个月前
发表于
化学
内容:一、原料及设备:1、原料:电池用电解液400ml,密度1.28g*mL-1,经
滴定
测得浓度约为5.65mol*L-1,计算得知当溶液体积约变为原溶液一半时提纯完成。
化学实验基础知识
神箭凌霄
15年6个月前
发表于
化学
内容:酸式
滴定
管 (1)酸式
滴定
管的洗涤 (2)酸式
滴定
管活塞涂凡士林 (3)酸式
滴定
管的读数、排气泡及
滴定
操作 2. ,碱式
滴定
管 (1)碱式
滴定
管的洗涤 (2)碱式
滴定
管的读数、排气泡及
滴定
操作 4.容量瓶 (1)检查容量瓶的瓶口是否漏水 (2)容量瓶的洗涤 (3)容量瓶的使用 用固体物质配制溶液;用液体物质配制溶液。
探讨一下“绿色环保蚀刻剂”的成分
herrick
9年0个月前
回复于
化学
内容:现在的问题是使用什么试剂
滴定
,能确认各种成分的比例。
淘宝一家网店的试剂仪器价目表
消失
15年10个月前
发表于
跳蚤市场
内容:A级 10ml 个 13.2白碱式
滴定
管A级 25ml 个 13.4白碱式
滴定
管A级 50ml 个 14白碱式
滴定
管A级 10ml 个 ,15.6白碱式
滴定
管A级 25ml 个 16白碱式
滴定
管A级 50ml 个 17棕碱式
滴定
管A级 25ml 个 15.6棕碱式
滴定
管A级 50ml, 个 17棕碱式
滴定
管A级 25ml 个 20棕碱式
滴定
管A级 50ml 个 22 三、 四川德玻 烧器 , 套 19
滴定
夹(铝制) 个 15.6
滴定
夹(塑料) 个 10大万能夹(仿金) 个 14大万能夹(喷塑) 个, 25ml 个 2
滴定
管刷 50ml 个 2.4吸管刷 5ml-20ml 个 2 八、 化学试剂 名称
基础化学常用英语词汇380条
thallium2012
13年9个月前
发表于
化学
内容:quantitative analysis 定量分析 165. chemical analysis 化学分析166. instrumental analysis 仪器分析 167. titrimetry
滴定
分析,193. significant figure 有效数字194. standard solution 标准溶液 195. titration
滴定
,196. stoichiometric point 化学计量点 197. end point
滴定
终点198. titration error ,
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误差 199. primary standard 基准物质200. amount of substance 物质的量 201. standardization ,化学反应 203. concentration 浓度204. chemical equilibrium 化学平衡 205. titer
滴定
度
酒精脱销,买了六斤白酒提纯。
梧桐雨西岭雪2
4年4个月前
发表于
化学
内容:有条件应考虑
滴定
分析(以后做)。
南科除垢剂或许能成为爱好者的硝酸来源
火星木条Nice
1年11个月前
发表于
化学
动手实践: 实验报导
内容:同时放出大量二氧化氮 我现在没有可以直接测量硝酸浓度的试剂,但从我的实验以及B站上的视频来看,除垢剂中硝酸的占比很高,而其他物质(配料表中标注成分为复合酸)的含量很少,所以可以把它视为稀硝酸,用
滴定
的方式测量浓度
[科创基金2022J11]探究水相制备CsIBr2的可行性结题报告
2SC1970
1年9个月前
发表于
化学
动手实践: 实验报导
内容:以后有机会时,会对该产物进行碘量法
滴定
分析,进一步测定其纯度。
硝镁法浓缩硝酸
盐卜
10年7个月前
发表于
化学
内容:倒出后的硝酸镁溶液 再次加热,浓缩硝酸镁溶液,并且加入氧化镁中和硝酸 加热的过程中会有一些硝酸挥发,在烧杯口处放一张pH试纸,试纸会立刻变红,用温度计测量液体温度为150℃ 冷却后的硝酸镁 因为没有
滴定
管无法测得其浓度
化学试剂参考价目表(10000~)
虎哥
17年4个月前
回复于
跳蚤市场
内容:221062 聚四氟搅拌塞 其他 个 29# 271063 聚四氟搅拌塞 其他 个 32# 651064 聚四氟搅拌塞 其他 个 34# 801065 打孔器 北玻 套 1*6 22.61066 大理石
滴定
台,天津 套 281067
滴定
夹(蝶式) 天津 个 191068 A字台(铸铁烤漆) 天津 套 291069 铁方台(铸铁烤漆) 天津 套 181070 双顶丝(铝塑) 天津 个 8.51071, 个 15ml(55*30*1.5) 2.12104 直吸管刷(羊毛) 个 5ml(45*20*1) 1.72105 直吸管刷(羊毛) 个 2ml(40*20*0.5) 1.452106
滴定
管刷, 个 100ml(90*22*2.5) 2.762107
滴定
管刷 个 50ml(80*20*1.5) 2.12108
滴定
管刷 个 25ml(65*20*1.5) 2.12109
滴定
管刷, 个 15ml(50*20*1) 1.72110
滴定
管刷 个 5ml(50*20*0.5) 1.352111 试管刷 个 2ml(17*7.5*2) 0.552112 试管刷 个 10ml
求有什么可以迅速感知CO浓度的物质
wesker
10年7个月前
回复于
化学
内容:析出的碘用硫代硫酸钠(Na2S2O3)标准溶液
滴定
,淀粉为指示剂,碘与淀粉变蓝,终点时蓝色消失。
求有什么可以迅速感知CO浓度的物质
wesker
10年7个月前
回复于
化学
内容:析出的碘用硫代硫酸钠(Na2S2O3)标准溶液
滴定
,淀粉为指示剂,碘与淀粉变蓝,终点时蓝色消失。
超级长帖:化学化工词汇英汉对照表
虎哥
15年11个月前
发表于
化学
内容:treatment 酸处理acid value 酸值acidic oil resin 酸性油尸acidic oxide 酸性氧化物acidic reaction 酸性反应acidic titrant 酸性
滴定
剂,acidification 酸化acidimeter 酸比重计acidimetry 酸量
滴定
acidity 酸度acidity function 酸度函数acidolysis 酸解acidometer,碱液alkali metal 碱金属alkali resistance 耐碱性alkali rock 碱性岩alkali salt 碱金属盐alkalimeter 碱量计alkalimetry 碱量
滴定
法,bromatimetry 溴酸盐
滴定
bromic acid 溴酸bromide 溴化物bromimetry 溴
滴定
bromination 溴化bromine 溴bromine fluoride 氟化溴bromine,buret clamp pincers
滴定
管夹buret stand
滴定
管架burner 灯burning furnace 燃烧炉burning point 燃烧点burning rate 燃烧速率
不用任何化工材料制备高纯度三碘化氮
锇钚铈锑
8个月5天前
发表于
化学
动手实践: 实验报导
内容:反应方程式:CO(NH2)2=加热=HCNO+NH3(反应制备的氨水含有较多氰酸和尿素、三聚氰酸等杂质,不可用于较为精细的分析、
滴定
实验!)
环氧氯丙烷—双酚A型树脂的制备:
zmhlij
11年11个月前
发表于
化学
内容:环氧氯丙烷 1.5-2克分子 NaOH(30%) 1.6-2.2克分子 操作步骤如下: 将双酚A和液碱、水投入反应锅,加热搅拌,维持,使双酚A全部溶解,然后冷却,将环氧氯丙烷加入,放热维持,再升温维持,抽水样
滴定
整点硝酸,为二氧化锰电极做准备
Halloween
4年0个月前
发表于
化学
内容:我这里准备了一点锰单质用来做硝酸锰的,二氧化锰电极我留到下一篇帖子跟大家分享一下(现在编辑帖子的时候硝酸还没蒸馏完,因此没法写实验报告
滴定
浓度算产率。,产率预计很低……
滴定
可知硝酸浓度为17.8mol/L,浓度还是过关的。
环氧氯丙烷—双酚A型树脂的制备:
zmhlij
11年11个月前
发表于
化学
内容:环氧氯丙烷 1.5-2克分子 NaOH(30%) 1.6-2.2克分子 操作步骤如下: 将双酚A和液碱、水投入反应锅,加热搅拌,维持,使双酚A全部溶解,然后冷却,将环氧氯丙烷加入,放热维持,再升温维持,抽水样
滴定
玻璃仪器洗涤和干燥
thallium2012
14年2个月前
发表于
化学
内容:肥皂,肥皂液,洗衣粉,去污粉,用于可以用刷子直接刷洗的仪器,如烧杯,三角瓶,试剂瓶等;洗液多用于不便用于刷子洗刷的仪器,如
滴定
管,移液管,容量瓶,蒸馏器等特殊形状的仪器,也用于洗涤长久不用的杯皿器具 和刷子刷不下的结垢,只有无法使用刷子的小件或特殊形状的仪器才使用有机溶剂洗涤,如活塞内孔、移液管尖头、
滴定
管尖头、
滴定
管活塞孔、滴管、小瓶等。
【申请科创基金A】高能材料RDX球形化技术的探究
trample
11年11个月前
发表于
科创基金
内容:球型RDX酸度检测方法:
滴定
法:将制备出的球形RDX用溶剂溶解,再用标准氢氧化钠溶液
滴定
,以计算结晶的酸度。
自制手机消毒机
放牛党主席
4年4个月前
回复于
极客DIY
内容:过氧乙酸的浓度可用碘量
滴定
法来测定(见过氧苯甲酸)。
[讨论]学术分制度是否可改进一下
虎哥
17年4个月前
回复于
化学
内容:2、查漏赶气再调零:意思是说
滴定
前应首先检查
滴定
管是否漏液,然后检查
滴定
管下端是否有气泡,若有应赶掉它,最后调节液面至\"0\"位[联想:(1)查漏的方法是在洗净的
滴定
管中加少量标准溶液。,若漏液,对于酸式
滴定
管应在活塞上涂适量的凡士林,对于碱式
滴定
管应更换一下玻璃球;(2)必须赶掉气泡,是因为如果
滴定
管尖嘴部分有气泡没有赶掉,
滴定
后气泡消失,则使测定结果偏高;(3)每次
滴定
最好都从零位开始,4、左手控制右手动:意思是说在
滴定
时,必须左手控制
滴定
管,右手持锥形瓶不断摇动。,7、酚酞示剂常相识,强酸弱碱甲基橙:这句的意思是说中和
滴定
常用酚酞做指示剂,只有强酸
滴定
弱碱(如盐酸
滴定
氨水)时,才能用甲基橙。,8、使用酸式
滴定
管,不盛碱液切记清:这句的意思是说不能用酸式
滴定
管盛放碱溶液(因为碱液和玻璃中的SiO2反应生成Na2SiO3而使活塞和
滴定
管粘在一起)。
【实验】从零开始制备烟硝
Antonio
1年1个月前
发表于
化学
动手实践: 实验报导
内容:实验药品:浓硫酸(这里为了方便直接使用了含浓硫酸的清洁剂,
滴定
出来的结果是92%,其中包含但不限于染色剂的杂质,也可以使用稀硫酸按前文方法得70%硫酸后蒸馏,但不宜使用稀硫酸直接蒸馏)【警告】实验产生的酸雾对人体有极大伤害
两份原创模拟试题
Aromatisation
1年4个月前
发表于
化学
严肃内容: 预印本
内容:酸碱
滴定
是重要的容量分析方法。,用少量蒸馏水冲洗表面皿内表面,加水至50mL,用Na2S2O3溶液
滴定
。,溶液呈淡黄绿色时停止
滴定
,加入1mL淀粉溶液,振荡显色,逐滴加入Na2S2O3溶液并不断振荡,溶液浅绿色保持30s即停止
滴定
,读取
滴定
管读数。,继续
滴定
至终点,终点时的操作和现象为____________(2分)。,接下来,用Na2S2O3
滴定
,写出离子方程式:____________(1分)。
磷酸法制备盐酸
Stewart
4年3个月前
发表于
化学
内容:经简易NaOH溶液
滴定
实验测得粗略浓度4.9%(质量分数)左右(计算过程中稀盐酸密度按1g/ml近似处理)。
碘酸钙的制备
轻疯科研中心
12年9个月前
发表于
化学
内容:实验日期:2011年9月28日 实验地点:沈阳市第五十一中学 室温:25 ℃ [size=3][font=宋体]【实验目的】 1.以碘酸钙的制备为例,了解物质制备的过程 2.掌握过滤、蒸发、洗涤、移液与
滴定
等实验操作
[分享]常用溶液的配制
jcy669
16年10个月前
发表于
化学
内容:硫代硫酸钠试液 可取用硫代硫酸钠
滴定
液(0.1mol/L)。,碘试液 可取用碘
滴定
液(0.1mol/L)。,硝酸银试液 可取用硝酸银
滴定
液(0.1mol/L)。,乙醇制氢氧化钾试液 可取用乙醇制氢氧化钾
滴定
液(0.5mol/L)。,碘试液 可取用碘
滴定
液(0.1mol/L)。
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