(1)要证明亚硫酸钠具有还原性,除亚硫酸钠外还应选用的试剂有
(2)要证明亚硫酸钠具有氧化性,除亚硫酸钠外还应选用的试剂有
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实验室现有质量分数为36.5%、密度为1.19g•cm﹣3的浓盐酸,若用该浓盐酸配制0.4mol•L﹣1的稀盐酸220mL,试回答下列问题:
(1)配制该稀盐酸时,应选用的容量瓶的容积为
A. 100mL B. 220mL C. 250mL D. 500mL
(2)计算需要
(3)在量取浓盐酸后,进行了下列操作:
①待稀释盐酸的温度与室温一致后,沿玻璃棒注入容量瓶中.
②往容量瓶中加蒸馏水至液面离容量瓶刻度线1~2cm时,改用胶头滴管加蒸馏水,使溶液的液面与瓶颈的刻度标线相切.
③在盛蒸馏水的烧杯中注入盐酸,并用玻璃棒搅动,使其混合均匀.
④用蒸馏水洗涤烧杯和玻璃棒2至3次,并将洗涤液全部注入容量瓶.
上述操作中,正确的顺序是(填序号)
(4)在下述配制过程中,配制的稀盐酸浓度将会偏高的是
①未转移溶液前容量瓶中有少量的蒸馏水
②量取浓盐酸时俯视刻度线
③量取浓盐酸后用蒸馏水洗涤量筒
④若未用蒸馏水洗涤烧杯内壁或未将洗涤液注入容量瓶
⑤定容时俯视刻度线
(5)在标准状况下,用一支收集满HCl气体的试管倒立在水槽中,水倒吸当充满试管时用塞子堵住试管口竖立(假设溶液不泄漏),则该溶液的溶质的物质的量浓度为
![](https://img.xkw.com/dksih/QBM/2019/1/19/2122092307038208/2125644071542784/STEM/eed51450425541b0bf191f718c23f3f2.png?resizew=523)
(1)除去粗盐中杂质(Mg2+、SO42-、Ca2+),加入的药品顺序正确的是
A.NaOH溶液→Na2CO3溶液→BaCl2溶液→过滤后加盐酸
B.BaCl2溶液→NaOH溶液→Na2CO3溶液→过滤后加盐酸
C.NaOH溶液→BaCl2溶液→Na2CO3溶液→过滤后加盐酸
D.Na2CO3溶液→NaOH溶液→BaCl2溶液→过滤后加盐酸
(2)制备钠单质的方法之一是将熔融NaCl进行电解,写出电解化学方程式:
(3)步骤Ⅰ中已获得Br2,步骤Ⅱ中又将Br2还原为Br-,其目的是
(4)某化学小组的同学为了了解从工业溴中提纯溴的方法,查阅了有关资料,Br2的沸点为59 ℃。微溶于水,有毒性和强腐蚀性。他们参观生产过程后,设计了如下实验装置:
![](https://img.xkw.com/dksih/QBM/2019/1/19/2122092307038208/2125644071542784/STEM/80f82952e5324cf4b7e0d029c89f6371.png?resizew=402)
①图中仪器B的名称是
②C中液体的颜色为
③D装置的作用是
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d69d7191f7166d1c82e92bd9c6ef391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43bbdf6631c9ad00bfb2fb2b901a839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43bbdf6631c9ad00bfb2fb2b901a839.png)
(5)大苏打(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5414fb67ab35d9a892fbb772ad3b6a60.png)
A.![]() | B.![]() | C.![]() | D.![]() |
(6)利用如下装置探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad60241600751443a89557c09ced8b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad60241600751443a89557c09ced8b5c.png)
方案①;向第一份溶液中加入少量酸性
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a63afc18472bb4f4d6388cf207da8b4.png)
方案②:向第二份溶液中加入KSCN溶液,不变红,再加入新制的氯水,溶液变红。
上述方案不合理的是
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/2d007b35-edba-4233-a522-53e8122f9dd6.png?resizew=345)
(1)仅从
(2)X与Z在一定条件下可以发生反应:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abba5604590a211f55ea2c1cc6c360c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db19b9887e571e3c25b0ab8991b286e9.png)
(3)请预测X与Y能否共存
(4)写出一个上述含硫物质间相互转化的非氧化还原反应的离子方程式
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5414fb67ab35d9a892fbb772ad3b6a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5414fb67ab35d9a892fbb772ad3b6a60.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/3add483b-5301-4477-9b3a-b23657b9724e.png?resizew=454)
完成下列填空:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
(2)D可以为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e7cc5ed124099d2b5c15896dbd0a38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689cceefc5aed24568b73c0a6910c539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e7cc5ed124099d2b5c15896dbd0a38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a3468840825a21e13453ba37fb8712.png)
(3)下列物质能与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
a.氢氧化钠溶液 b.溴水 c.品红溶液
(4)常温下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c783bab7586f60dc14d4f10b6d5b12.png)
(5)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43bbdf6631c9ad00bfb2fb2b901a839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a63afc18472bb4f4d6388cf207da8b4.png)