![](https://img.xkw.com/dksih/QBM/2021/6/20/2747257724698624/2747333197676544/STEM/02a5490c137f488187e8ec2ce7412325.png?resizew=639)
(1)操作①为
(2)氧化时发生反应的离子方程式为
(3)试剂X可以选择
A.酒精 B.四氯化碳 C.盐酸 D.苯
(4)实验室进行操作②需要的玻璃仪器有烧杯、玻璃棒和
相似题推荐
I.实验室制备NH4ReO4的装置如图所示。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/24/1d1a32c5-79f2-45b6-87cb-ee565434d05a.png?resizew=510)
已知:(1)Re2O7易溶于水,溶于水后生成HReO4;HReO4与H2S反应生成Re2S7;
(2)2NH4ReO4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd684a72f6ee73c034dca9d71960345.png)
回答下列问题:
(1)仪器a的名称是
(2)反应开始前先向C中三颈烧瓶内加入一定量的Re2O7和水。关闭K2、K3,打开K1、K4,三颈烧瓶内生成Re2S7。关闭K1,打开K2通入N2一段时间,通入N2的目的是
(3)下列装置可用作装置单元X的是
A.![]() | B.![]() |
C.![]() | D.![]() |
II.NH4ReO4的纯度测定[M(NH4ReO4)268g/mol]
称取wgNH4ReO4样品,加适量水溶解,注入三颈瓶中,然后逐滴加入足量10%NaOH溶液,通入水蒸气,将样品液中的氨全部蒸出,用VmLc1mol•L-1的盐酸标准溶液吸收,蒸氨结束后取下接收瓶。取吸收液用c2mol•L-1NaOH(稀)标准溶液滴定过剩的HCl,达到终点时消耗V2mLNaOH溶液。
(4)实验所用的NaOH标准溶液,通常采用间接法配制,即配成近似浓度的溶液,再用基准物标定。不能采用直接法配制的原因是
(5)样品中NH4ReO4的质量分数为
III.高纯度铼的制取
(6)高温下用H2还原NH4ReO4可制得金属铼,装置如图所示:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/24/3bac6532-1e57-4773-8c5b-6ab482de6a20.png?resizew=322)
①装置B中盛放的试剂为
②玻璃管内发生反应的化学方程式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53029bbb63ce7d3b0dbd2352d675bf1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3b111c2a9c4dc97cb8ce0d3321a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca31ea5a33e950ef8f5c55058838893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0c9f9ccbeea5cdd472437ad1a390de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
金属离子 | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
开始沉淀的![]() | 7.4 | 4.7 | 1.5 | 3.4 | 8.9 | 6.2 |
沉淀完全![]() ![]() | 9.4 | 6.7 | 2.8 | 4.7 | 10.9 | 8.2 |
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cedebd6f143accf8c0ba10c9b4f302.png)
(2)“除杂”时,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac7f310bc7b7f88ce9620c3a0e49b02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a316322ef211c0f478232054b070466.png)
①滤渣的主要成分是
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac7f310bc7b7f88ce9620c3a0e49b02.png)
(3)“萃取”时,用硫酸调节溶液的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/118eae195828a5033d4d4c01cb323cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870613387e791d5320fc64565dd0d813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63128aacc45a20277cfb58bd0869a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
②往“萃取”所得有机层中加入
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabf3433f95b16485024c4eede9f2a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce93086f0133444d40743d654cba1c55.png)
(4)“沉钴”时,往萃余液中加入
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41aa3d56362ace480142672bc10a143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42fd81d4d64273d79a8c1dfcac21c4aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e0578e08dc0446c13d41e753fbbe90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cedebd6f143accf8c0ba10c9b4f302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b044e4519804b27deb5aad6180a9729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4d9129b79ac985bc46c88b092aeb02.png)
(5)“煅烧”时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e0578e08dc0446c13d41e753fbbe90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a85a5f8dce3315f9a093c07f03c4985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98183b7becdd0efb6fe8f57cdcbce983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/412f9177b9441ba165d24e0f7984b7ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be2de8e9e3474388d00c38eb3e06125.png)
(6)含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab817b608297b5c3f390874d0e2a2964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7464ad819a2b8df91d89207e0190dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0d5280d3a8ece6529f05b984ece764.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bbbfc69cfd78a89c450bdb65076e431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07e2f494f7a4feed8f7d93ce2ba2a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78582841ae22c355b39202863c823e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b765f83eea48c6f49c74f6c38be42f7a.png)
【推荐3】镍、钴及其化合物在工业上应用广泛。从某含镍废渣(含主要成分为NiO、CoO、Co2O3及少量杂质Al2O3)提取碳酸钴、硫酸银的工艺如下:
已知:25℃,Ksp[Co(OH)2]=4.0×10-15,lg2=0.3。
(1)“酸浸”中,Co2O3转化为Co2+的离子方程式为
(2)“沉淀”的主要成分是
(3)“萃取”和“反萃取”可简单表示为:2HX+Ni2+NiX2+2H+。为了将有机层的镍充分“反萃取”得到NiSO4溶液,需要往有机层中加
(4)“沉钴”反应的离子方程式
(5)某工厂用m1 kg废渣(含钴10%)制备CoCO3,最终得到产品 m2 kg,产率为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/7ec93cd2-fbd6-42e0-bba4-149133f476ef.png?resizew=649)
(1)灼烧海带时,除需要三脚架、泥三角和酒精灯外,还需要用到的实验仪器是_______。
A.烧杯 | B.坩埚 | C.蒸发皿 | D.试管 |
(3)向碘水中加入适量CCl4并振荡,静置后观察到的现象是__________。
A.形成均匀的无色溶液 | B.形成均匀的紫红色溶液 |
C.液体分层,下层呈紫红色 | D.液体分层,上层呈紫红色 |
![](https://img.xkw.com/dksih/QBM/2021/1/15/2636880260161536/2637419121811456/STEM/97c6494b-5060-43b4-877d-2e3fd064d1c6.png?resizew=581)
(1)灼烧海带时除需要三脚架、酒精灯、泥三角外,还需要的主要仪器是
(2)为更好的完成实验,灼烧海带时,需加入一定量的氢氧化钠充分混合后再灼烧。此操作目的是
(3)向盛有碘离子溶液中加入CCl4和氯水,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/6e7a865b-0654-4cf6-8861-48f63d7390b5.png?resizew=621)
(1)操作①的名称
(2)操作②选用CCl4的理由是_____(填写序号)。
A.CCl4不溶于水 | B.CCl4的密度比水大 |
C.碘在CCl4中比在水中溶解度更大 | D.CCl4与碘水不反应 |
碱性条件:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f165262718e804e9c1542cb10edc9b53.png)
酸性条件:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59cfc3032e6ae79bf49327a554500e94.png)
以下是反萃取过程的操作,请填写相关空格:
①向装有I2的CCl4溶液的
②振荡至溶液的
③将含碘的碱溶液从仪器的
④边搅拌边加入几滴1mol⋅L-1H2SO4溶液,溶液立即转为棕黄色,并析出碘晶体。
(4)本实验中可以循环利用的物质是