解题方法
1 . Co、La元素及其化合物在工业及生活方面有重要应用。回答下列问题:
(1)基态Co的价电子排布图_______ ,核外电子的空间运动状态有_______ 种。
(2)一定条件下,
、
、
和
反应可制得
,反应的方程式为_______ ,
的配位数为_______ 。区别
和
两种溶液的试剂是_______ 。
(3)
的八配位金属羰基化合物
的结构如图所示,
作配体,配位原子为C,而不是O,其原因是_______ ,
含_______
键。
在储氢和超导等领域具有重要应用。高压下,
中的每个
结合4个
形成类似
的结构独立存在,即得到晶体
。则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e352b320a9922111df1324b6d7794e7e.png)
_______ 。晶体
的密度为_______
。(写出计算式即可)
(1)基态Co的价电子排布图
(2)一定条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04846e6de290f28892052e8987fbfd2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c38c6b842b451f57d81f9f8dd320e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe2066525aa0616cf44d051d57bf713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648b45686eba2e2cb73251542a27e54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b4f707a3c6ea0f1b205fdf90f0a42b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b4f707a3c6ea0f1b205fdf90f0a42b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b4f707a3c6ea0f1b205fdf90f0a42b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a6c5e527af5d6b1db415f4eec04c066.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f1311ce00b84a4a4b75186ed4b4612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f29feaf630c512cd937df7bafd44cdd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a122e25cf4eb9f03ffe5ec823bfc31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a57b32d87a58286f9648d4918edcfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e216b5383d5ac49fcb8444c0df198a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8bd596648585ec714a24a476e03dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a190cda224769799e95d1dde36092c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c4fd6998a8748375793cd1674f7417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c4fd6998a8748375793cd1674f7417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff19349a80467d65564cc2953f0c978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8bd596648585ec714a24a476e03dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e352b320a9922111df1324b6d7794e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8bd596648585ec714a24a476e03dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b765f83eea48c6f49c74f6c38be42f7a.png)
您最近一年使用:0次
解题方法
2 . 将盐酸分别滴加到
和
浊液中,体系中
与
(
为
、
、
)的变化关系如图所示。已知
,下列说法错误的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd11d799ed1e438ff8f27d130c5fafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa31587fc66a0fa6f0fe79eb9e30eb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ef1c90f65e403d833f3779b63768bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ca29a19c226f659037c108fd0f58c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/674e31dbbc3c338972a2fa85d588afae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e18846ec9f4312e7e93b3e60efa6d6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa13b2b9b732cea91042f6c823f83b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b6dc4bbd1ebd58b3ad9211aa06c55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb1ecfee643d3f0786c075b6240e2e9.png)
A.![]() ![]() ![]() |
B.![]() |
C.c点溶液中:![]() |
D.![]() ![]() |
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3 . 1,6—烯炔类化合物在膦配位的铑催化剂的作用下,可进行不对称环化异构,生成五元杂环化合物,反应如下。下列说法正确的是
甲 乙
A.甲和乙均不存在手性碳原子 | B.甲中所有碳原子不可能共平面 |
C.可用新制银氨溶液鉴别甲和乙 | D.甲的同分异构体中苯环上有5个取代基的共有6种 |
您最近一年使用:0次
解题方法
4 . 甲烷干重整(DRM)是利用
和
在催化剂的作用下制备合成气,作为可持续替代燃料。DRM的主要反应为:
Ⅰ.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d16dd299c20d4e02ec3f79c3bd1dde6.png)
Ⅱ.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4553558e4168b273d417957c73861f9c.png)
该过程中还伴随积碳反应的发生。
(1)一定压强下,由最稳定单质生成
化合物的焓变为该物质的摩尔生成焓。已知
、
的摩尔生成焓分别为
、
。则
的摩尔生成焓为_______
。
(2)甲烷和二氧化碳的起始物质的量均为
,实验测得在
下,平衡时各组分的量随温度变化如图所示。_______ mol,反应Ⅱ的压强平衡常数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75bbf44099ea991d7a0538e2c3b1ec99.png)
_______ 。
②为了消除积碳带来的影响,反应选择在_______ (填“高温”或“低温”)下进行。
(3)在不同压强下,按照
投料,假设只发生反应Ⅰ和Ⅱ。
的平衡转化率随温度的变化关系如图所示。
、
、
,三者由大到小顺序为________ 。
②压强
、
、
、
由小到大的顺序为________ 。
③
,四条曲线几乎交于一点的原因是________ 。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff19349a80467d65564cc2953f0c978.png)
Ⅰ.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c775e80674cdbfac8d720d3cd33c049e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d16dd299c20d4e02ec3f79c3bd1dde6.png)
Ⅱ.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffd9fa3eca4197cff767f45d3d06ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4553558e4168b273d417957c73861f9c.png)
该过程中还伴随积碳反应的发生。
(1)一定压强下,由最稳定单质生成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26edabbe2c43af4e74203ad34c4eff2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1124f330375d2116cce2b4010ff17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26a1cf4a7fd8cd7d9a679d839423c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9678df3389f163bd873ead243fd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57712b0d03315a4382e8b7d62a0de9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b2a6bc4b5ef80a57a78c144749392c.png)
(2)甲烷和二氧化碳的起始物质的量均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26edabbe2c43af4e74203ad34c4eff2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18960c9050ba6a18b216df9963ca8516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75bbf44099ea991d7a0538e2c3b1ec99.png)
②为了消除积碳带来的影响,反应选择在
(3)在不同压强下,按照
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76ab4b893dac27ab4f91f852ee78f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e7704492116d4c017f8d436a81d287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b87dbd5e79622e181601b641fa9f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42342d1979557adc1384a39c5076520.png)
②压强
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d38a15c34acaf1c4aed775468b5797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba928fa185ace46db111aa6ab1d77b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ccff9c7a26bf7b705bd8d78a2a824e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b5ff0df018ead058c44459d3b56917.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c40cc7af3916e4237b5e3b57ca0cfc.png)
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解题方法
5 . 锂离子电池正极材料(主要成分为
,还含有少量铝箔、
等杂质),从废旧锂离子正极材料中回收氧化钴的工艺流程如图所示:
,
,
。
回答下列问题:
(1)废旧电池拆解提取正极材料前,需将其浸入
溶液中,其目的是________ 。
(2)滤液1的主要成分是________ (填化学式,下同)。滤液2的主要成分是________ 。
(3)“酸溶”时发生的主要反应的离子方程式________ ;不用盐酸替代硫酸的原因是________ 。
(4)不宜使用
沉钴的原因是________ 。
(5)
,若“沉钴”开始时
,为了获得纯净的
,应控制溶液的![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de58fbd0b7f5f632dfe3719c8122ab1c.png)
________ 。
(6)若最终得到产品
,则可以重新制备________
正极材料(含钴
)。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3b111c2a9c4dc97cb8ce0d3321a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7c3b9e23d299dca3340858b5b3dbd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f988ef8f87925047d752423e34b8e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819516e2fe706ec8b1e1f7fade74f1b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ac9e5e7b99b75b61851a6ec1459166.png)
回答下列问题:
(1)废旧电池拆解提取正极材料前,需将其浸入
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a7a58438b831b6a45a9874adce1055.png)
(2)滤液1的主要成分是
(3)“酸溶”时发生的主要反应的离子方程式
(4)不宜使用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd46a1a853c372c1fb6c7a88cd947e87.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f988ef8f87925047d752423e34b8e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1538653cd13dd6d5f078f7e395c006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda9504bedff4f2c7ec58b542543866d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de58fbd0b7f5f632dfe3719c8122ab1c.png)
(6)若最终得到产品
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53746255785fbb75e82a4b1981c06542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3960d67499df76159982657fe3a1cbca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733b1ceeead9ff892539d46a23f3626.png)
您最近一年使用:0次
6 . 亚硫酸钠可用作人造纤维稳定剂、造纸木质素脱除剂等。某课题小组利用二氧化硫制备亚硫酸钠并测定其含量,装置如下所示。
(1)装置A中所装试剂为________ ,作用是________ 。
(2)实验时,关闭活塞
,通入过量
,再打开活塞
,充分反应后即可制得亚硫酸钠。反应的离子方程式为________ 。
(3)上述装置中存在的一处缺陷是________ 。
(4)亚硫酸钠的溶解度随温度的变化如上图所示,从
装置溶液中获得
的方法是________ 。
(5)测定上述产品中亚硫酸钠样品含量。其装置如图所示:
样品并加入水将其溶解,锥形瓶中加入
水、
淀粉溶液,并预加
的碘标准溶液,搅拌。
②持续通入氮气,再加入过量磷酸,加入并保持微沸。同时用碘标准液滴定,至终点时滴定消耗了
碘标准溶液。
③做空白实验,消耗了
碘标准溶液。
该样品中亚硫酸钠的含量为_______ (保留两位有效数字);
若先加入磷酸再通入氮气,会使测定结果_______ 。(填“偏高”“偏低”或“无影响”)
(1)装置A中所装试剂为
(2)实验时,关闭活塞
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2a39beea5adf5d07aea0424ca7a64f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2a39beea5adf5d07aea0424ca7a64f.png)
(3)上述装置中存在的一处缺陷是
(4)亚硫酸钠的溶解度随温度的变化如上图所示,从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e8babee63bfc889ae5a34632284bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43bbdf6631c9ad00bfb2fb2b901a839.png)
(5)测定上述产品中亚硫酸钠样品含量。其装置如图所示:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b61a3bc10006d468cf7c92e7a2fd7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc3ba59b5ead16e5b90122e84dd94afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e590dd0c530d49a656e9654ca00354fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540f3044291d8cf587ab13fb09e0091f.png)
②持续通入氮气,再加入过量磷酸,加入并保持微沸。同时用碘标准液滴定,至终点时滴定消耗了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c5eb092d5cb89e8907fb3d76ca2fb0.png)
③做空白实验,消耗了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb839f18e9ca377782fed456b901ae2.png)
该样品中亚硫酸钠的含量为
若先加入磷酸再通入氮气,会使测定结果
您最近一年使用:0次
解题方法
7 . 已知橙红色的配离子
可被
氧化成淡蓝色的配离子
(
的还原产物是
),现用浓度分别为
、
、
的
溶液进行实验,
随时间
的变化曲线如图所示。下列有关说法错误的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173cab0f49eac1d08d55e3fa9d11fbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7094324b99193ef564945aad636dae09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4434f861c2f338233780e2e97af28ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7094324b99193ef564945aad636dae09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cebce26bf7ade26b56f6d64cc3528de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70a0fc059b00d4be468a6dd5bf42302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa2a9e9d2ced5482f78c8469ceab06b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b548600c6a4285c4facc6c921e613209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7094324b99193ef564945aad636dae09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debf7973498f05d7eacec8128b9bf677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e46bff1ba235329ed6ae1321e33f3b5.png)
A.实验中![]() ![]() |
B.三组实验中,反应速率都是前期速率增加,后期速率减小 |
C.![]() ![]() ![]() |
D.平衡后加水稀释,![]() |
您最近一年使用:0次
8 . 以废料铅膏(
、
、
、
等)为原料,制备超细
,实现铅循环再利用的流程如下:
,
。②
溶解在
溶液中(杂质不溶于
)的溶解度曲线如图所示:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c712a9f40571fcbdbf7ba702102429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303cc16d8f5d6e2578c5f71d26874321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d809ecbd2ab9eb4fa0ffcd780b48d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89166004998cd892dfd5b087c7e64c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303cc16d8f5d6e2578c5f71d26874321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f21fcceafbd81a9c90980037d1e765d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d189c24012ede901bf3421744f46ac3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/303cc16d8f5d6e2578c5f71d26874321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce93086f0133444d40743d654cba1c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce93086f0133444d40743d654cba1c55.png)
A.步骤Ⅰ发生的主要反应有![]() |
B.步骤Ⅱ,若滤出的![]() ![]() ![]() |
C.过程中为提高产品产率,滤液3应循环使用 |
D.精制的操作是在![]() |
您最近一年使用:0次
9 .
(乙二胺四乙酸,简写为
)滴定
和
时发生反应:
(无色)
;
(无色)
;二甲酚橙溶液呈黄色,在
值
时能与
结合,
值
时与
结合,形成的化合物均为紫色。用
测定某
和
混合液中金属离子浓度,实验步骤为:
①取
混合液于锥形瓶中调
值,滴加几滴二甲酚橙溶液,用浓度为
标准EDTA溶液滴定至颜色突变且半分钟不恢复原色。此时消耗EDTA的体积记录为数据一。
②向锥形瓶中加入缓冲溶液调
至合适数值,再用EDTA滴定至颜色突变且半分钟不恢复原色。再次消耗EDTA体积记录为数据二。
③重复以上实验三次,数据一的均值为
,数据二的均值为
。
下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d027efb5acacd07d5e607e891909d11f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614c31877c8c21004a844fe8f871c276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7aaecdbe7607b19853ee6f058adec5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34c5b2b5eb7369ec3447c43a8564a64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d3d8974a499351dcdd7eca12b639874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ad1f66322a055371ccb18cdd09d6c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bf93c35784dc6d7ad3a17114ba83a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b40bf18f3f0cdf4a8282201383f0bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ad1f66322a055371ccb18cdd09d6c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb68996ba971893caf70fb7d9240fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b58e12efe026bd833a9e1b318f5c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7aaecdbe7607b19853ee6f058adec5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43978c1155b0fc0c635aa4ad3538a0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34c5b2b5eb7369ec3447c43a8564a64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88cafdf293d86fdc2e414926ad26f6c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7aaecdbe7607b19853ee6f058adec5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34c5b2b5eb7369ec3447c43a8564a64.png)
①取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c5eb092d5cb89e8907fb3d76ca2fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c6af6397ed9e501717f3ae174911d1.png)
②向锥形瓶中加入缓冲溶液调
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
③重复以上实验三次,数据一的均值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63257b3328b8e1887836d8adab147204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd108065e36d81c00728c27bd0313c09.png)
下列说法正确的是( )
A.步骤②![]() | B.步骤①与步骤②突变颜色相同 |
C.![]() | D.若步骤①中多滴了EDTA,则测得![]() |
您最近一年使用:0次
10 .
(乙二胺四乙酸,简写为
)滴定
和
时发生反应:
(无色)
;
(无色)
;二甲酚橙溶液呈黄色,在
值
时能与
结合,
值
时与
结合,形成的化合物均为紫色。用
测定某
和
混合液中金属离子浓度,实验步骤为:
①取
混合液于锥形瓶中调
值,滴加几滴二甲酚橙溶液,用浓度为
标准EDTA溶液滴定至颜色突变且半分钟不恢复原色。此时消耗EDTA的体积记录为数据一。
②向锥形瓶中加入缓冲溶液调
至合适数值,再用EDTA滴定至颜色突变且半分钟不恢复原色。再次消耗EDTA体积记录为数据二。
③重复以上实验三次,数据一的均值为
,数据二的均值为
。
下列说法错误的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d027efb5acacd07d5e607e891909d11f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614c31877c8c21004a844fe8f871c276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7aaecdbe7607b19853ee6f058adec5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34c5b2b5eb7369ec3447c43a8564a64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d3d8974a499351dcdd7eca12b639874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ad1f66322a055371ccb18cdd09d6c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bf93c35784dc6d7ad3a17114ba83a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b40bf18f3f0cdf4a8282201383f0bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ad1f66322a055371ccb18cdd09d6c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb68996ba971893caf70fb7d9240fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b58e12efe026bd833a9e1b318f5c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7aaecdbe7607b19853ee6f058adec5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43978c1155b0fc0c635aa4ad3538a0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34c5b2b5eb7369ec3447c43a8564a64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88cafdf293d86fdc2e414926ad26f6c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7aaecdbe7607b19853ee6f058adec5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34c5b2b5eb7369ec3447c43a8564a64.png)
①取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c5eb092d5cb89e8907fb3d76ca2fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c6af6397ed9e501717f3ae174911d1.png)
②向锥形瓶中加入缓冲溶液调
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
③重复以上实验三次,数据一的均值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63257b3328b8e1887836d8adab147204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd108065e36d81c00728c27bd0313c09.png)
下列说法错误的是
A.用滴定管量取![]() |
B.配制EDTA标准液时可以用底部有少量蒸馏水的容量瓶 |
C.二甲酚橙与![]() ![]() |
D.滴定读数时,应单手持滴定管上端并保持自然垂直 |
您最近一年使用:0次