![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3259baddfe9bc02ac5766f800607825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a63d08c6a84ce55f7c6b3131d069bb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005347070dffab62c10dba68c72af84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca7d4b6503977cee3e19760785eae00d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448214d120a423ca1014cde0d1eaefc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9fd2e742575e86f52d37e43ae5661.png)
则反应③的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5b3b345c22492ee5d968a0f56231d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b2a6bc4b5ef80a57a78c144749392c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
(3)在一恒温、容积可变的密闭容器中,充入1mol
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3dd0c94449b5be65dc1c46bbb90afde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7644a7769a5fa1bdab46cc0b2dee2861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d068b8f5623a7c2877626933ffc618fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05436bde26a57d10ee414da6845f2b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d1f1e78b8ee320c79a71d3308b8db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dc8580117b909bcb9c569349bc8710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd0afc53383b82dc6c1e91f73c42d64.png)
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943162638852096/2943203834085376/STEM/1724966b-b60a-4033-9437-179896a4bc8a.png?resizew=266)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4298cb837170c021b9f2cd4e674a6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d1f1e78b8ee320c79a71d3308b8db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e762a80c1216318892c2155bef79681.png)
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943162638852096/2943203834085376/STEM/9af547d4-f2e8-43fc-ba21-99a973c9d568.png?resizew=360)
相似题推荐
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4ac184aef047428370bf877105fa50.png)
![](https://img.xkw.com/dksih/QBM/2020/11/11/2590575252709376/2590677385797632/STEM/f83faf37716f4e76a8a26fb7bc156cfe.png?resizew=26)
(1)实际生产中,考虑生产成本,应提高
若同时提高氢气的产率,可采取的下列措施有
a.增大CO浓度 b.增大H2O(g)浓度 c.增大压强 d.适当降低温度 e.分离出CO2
(2)若在800℃的恒容密闭容器中,充入1 mol CO和3 mol H2O,达平衡时CO转化率为75%。该反应的平衡常数为
(3)一定温度下,向该反应体系投入生石灰可增大H2的体积分数。根据CO2(g)+CaO(s)=CaCO3(s) △H=-178 kJ·mol-1;△S=-169.3 J·mol-1·K-1,用此方法增大H2的体积分数需
(4)上述体系制成的H2含有一定量的CO,若用于合成氨,其中的CO会造成催化剂“中毒”。有人从工业提纯粗镍的反应Ni(s)+4CO(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4ac184aef047428370bf877105fa50.png)
(1)已知:
NO2(g)+CO(g) = CO2 (g)+NO(g) △H =-230.0kJ·mol-1
N2 (g)+O2 (g) = 2NO(g) △H =-180.0 kJ·mol-1
2NO(g)+O2 (g) = 2NO2 (g) △H =-112.3kJ·mol-1
若NO2气体和CO 气体反应生成无污染气体,其热化学方程式为
(2) 由CO生成CO2的化学方程式为CO+O2
![](https://img.xkw.com/dksih/QBM/2019/3/12/2158823759454208/null/STEM/9014d07788924d029f385739e98044c6.png?resizew=33)
(3)汽车的排气管上安装“催化转化器”,其反应的热化学方程式为:2NO(g)+2CO(g)
![](https://img.xkw.com/dksih/QBM/2019/3/12/2158823759454208/2161214380883968/STEM/5303d021c04643e3891b022c9b3e2d62.png?resizew=33)
![](https://img.xkw.com/dksih/QBM/2019/3/12/2158823759454208/2161214380883968/STEM/42c81e305f0a4bee9ca073a9846b1a21.png?resizew=244)
①图中a、b 分别表示在相同温度下,使用质量相同但表面积不同的催化剂时,达到平衡过程中n (NO)的变化曲线,其中表示催化剂表面积较大的曲线是
②T℃时,该反应的化学平衡常数K=
③15min 时,若改变外界反应条件,导致n (NO)发生图中所示变化,则改变的条件可能是
(4)NO2可用氨水吸收生成NH4NO3。25℃时,将x mol NH4NO3溶于水,溶液显酸性,原因是
(1)市售过氧乙酸的浓度一般不超过21%,原因是
(2)利用上述反应制备760 g CH3CO3H,放出的热量为
(3)取质量相等的冰醋酸和50% H2O2溶液混合均匀,在一定量硫酸催化下进行如下实验。
实验1:在25 ℃下,测定不同时间所得溶液中过氧乙酸的质量分数。数据如图1所示。
实验2:在不同温度下反应,测定24小时所得溶液中过氧乙酸的质量分数,数据如图2所示。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/0adc01ee-a645-4a00-a979-e3bcaab8ddbb.png?resizew=615)
①实验1中,若反应混合液的总质量为mg,依据图1数据计算,在0—6h间,v(CH3CO3H)=
②综合图1、图2分析,与20 ℃相比,25 ℃时过氧乙酸产率降低的可能原因是
(4) SV-1、SV-2是两种常用于实验研究的病毒,粒径分别为40 nm和70 nm。病毒在水中可能会聚集成团簇。不同pH下,病毒团簇粒径及过氧乙酸对两种病毒的相对杀灭速率分别如图3、图4所示。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/febf3f8f-345e-45b7-9e93-abccfa397f4d.png?resizew=646)
依据图3、图4分析,过氧乙酸对SV-1的杀灭速率随pH增大而增大的原因可能是
Ⅰ.将CO2转化为炭黑进行回收利用,反应原理如图所示。
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967989885943808/2968109972783104/STEM/bfea4ee1-bd49-4fdb-b940-b82cdd080079.png?resizew=241)
(1)从能量角度分析FeO的作用是
(2)写出炭黑和氧气转化为CO2的热化学方程式:
Ⅱ.以CO2和甲醇为原料直接合成碳酸二甲酯(CH3OCOOCH3)的反应为:
CO2(g)+2CH3OH(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4ac184aef047428370bf877105fa50.png)
在不同的实验条件下,测定甲醇的转化率。温度的数据结果为图a,压强的数据结果在图b中未画出。
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967989885943808/2968109972783104/STEM/a450869e-e8cb-44a3-9a0d-6160a197a0be.png?resizew=425)
(3)该反应的ΔH
(4)在100~140℃之间,随着温度升高,甲醇转化率增大的原因是
(5)在图b中绘制出压强和甲醇转化率之间的关系(作出趋势即可)。
Ⅲ.利用Al-CO2电池(工作原理如下图所示)能有效地将CO2转化成化工原料草酸铝。
![](https://img.xkw.com/dksih/QBM/2022/4/28/2967989885943808/2968109972783104/STEM/b0d538f7-188e-4aef-96f6-64bde956e04d.png?resizew=197)
(6)电池的总反应式为
(7)电池的正极反应式:2CO2+2e-=C2O
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1903287227f2e5af1aa48d3103239111.png)
①6O2+6e-=6O
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca6e637612c4f886ab061af86562f7f.png)
②……
写出反应②的离子方程式:
(1)工业上,常用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe2066525aa0616cf44d051d57bf713.png)
已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d76899199d9e4c79f0536ae943a1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8e8769ca85509f03e94dbfba954e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8243308cd908a03b5b0d07bca41bacab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12da1f2e8a7b388d2607f6da871eeaa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea2db04007e869bb69eb2549079de77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b67a33ef2074a4770f82e6bb87e4eef6.png)
反应
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64840bf169493fb5ce3bd51b7e811c1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d529dd8302544058eb2930a98a7d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b2a6bc4b5ef80a57a78c144749392c.png)
(2)氯乙烷是重要的含氯化合物,常用于医药、农药的制造。可用乙烯和氯化氢反应制备氯乙烷,反应方程式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8855aa95a692a8607def2f2ef1370e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d2bac56d876662d223f34aca2d5c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc123c03233c27b209f7a1b8722c0c60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d2bac56d876662d223f34aca2d5c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/387d2029bc8e5f0ceb454be937a07e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc123c03233c27b209f7a1b8722c0c60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a17ae5943842d19b4b110276be058c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/58878ab1-213b-4f6f-b7f9-3da5fa138c82.png?resizew=342)
①12.5s时反应恰好达到平衡,则0~12.5s内,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/387d2029bc8e5f0ceb454be937a07e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b1049834c3dc65c404f2ad20a97885.png)
②第一次平衡时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/387d2029bc8e5f0ceb454be937a07e3f.png)
③在第20s时,仅改变了某一个条件,则改变的条件是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be67926dcdcae9406c284c19b51258b9.png)
④在1L的恒温恒容密闭容器中发生上述反应,下列能说明反应已经达到平衡的是
A.容器内气体的总压强不变
B.容器内碳元素的质量分数不变
C.单位时间内,断裂1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d2bac56d876662d223f34aca2d5c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39db4926d2cfec1950220a40732d18a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d2bac56d876662d223f34aca2d5c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67348fb67e8b735b100002c8d6109092.png)
D.容器内气体的密度不变
(3)工业上常用氯苯(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69579f93a801a0cf57a5ff7dc2f8088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624cfde5889eb5269fdac20cb1b2753b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545db59d62fd178419589ceeeccd2161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2df1850dfb8a114a29ce27a868904530.png)
I.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9614f54b48da93187ce2dce07e5d9ce6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/973fb679b742dbaaa0f7db9c81205973.png)
II.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c58284920bcec0c96d24684103ba3ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab3a3bf0157d0857784d9e53da16653.png)
现将一定量的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69579f93a801a0cf57a5ff7dc2f8088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624cfde5889eb5269fdac20cb1b2753b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624cfde5889eb5269fdac20cb1b2753b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9559ba26684b8bf0f1446ce2d46298.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/c9c25698-b3da-4b93-bbcf-43e3f1da7074.png?resizew=513)
结合图2和图3,该模拟工业生产制备
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545db59d62fd178419589ceeeccd2161.png)
(1)已知相关反应的热力学数据如下表所示:
反应 | ![]() | ![]() | |
Ⅰ | ![]() | ![]() | |
Ⅱ | ![]() | ![]() | |
Ⅲ | ![]() | a | |
Ⅳ | ![]() | b |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e2958da47a69866c9397a79f715740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9235414bc13fe2ad07f1f6fd8f14c9ad.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869d79dce7398395d520ccc763cb9359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954007c25a5ab3f8d73d963c5aaf2983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75bbf44099ea991d7a0538e2c3b1ec99.png)
(2)模拟工业尾气脱硝:一定条件下,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb5cea9ddd8f4171ebd9d92dd220b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa8f3c3850dcedf15c42dbb6200a1a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf98e424dd8f88303203bf2085d18a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9110e80d125190c4b5bed606e1fc2220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff19349a80467d65564cc2953f0c978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9110e80d125190c4b5bed606e1fc2220.png)
②若只考虑反应Ⅰ和Ⅲ,则温度为T时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9abe28b8c36a4ffece058a9830c1457.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869d79dce7398395d520ccc763cb9359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9110e80d125190c4b5bed606e1fc2220.png)
A.适当降低温度 B.加入少量生石灰
C.恒容充入更多
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa8f3c3850dcedf15c42dbb6200a1a4.png)
(1)亚磷酸是
(2)PCl3水解可制取亚磷酸,反应的化学方程式是
(3)在H3PO3溶液中存在电离平衡: H3PO3
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4ac184aef047428370bf877105fa50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da75639d9df997d684f1d6d99692cd.png)
①某温度下0.10mol·L-1H3PO3溶液pH=1.6,即溶液中c(H+)=2.5
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
②Na2HPO3溶液中离子浓度由大到小的顺序是
(4)电解Na2HPO3溶液也可得到亚磷酸,装置示意图如下:
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849772570640384/2850265582026752/STEM/0b1752cf-d715-49f3-841a-09ff72d1420f.png?resizew=487)
①阴极的电极反应为
②产品室中反应的离子方程式为
(5)亚磷酸具有强还原性,可将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab52c58d108a8e68c57129f2bb03dd01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f5286821e6e7fe0a529d31b55bc0e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fd49ed0ea7e83d0c1d72a33684977f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda59db30f611dfc7196f09bc36440af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe5a1ca7a8f48a48ef807515db2e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8a7d67791f49c4973a5c5cfe80e7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f8b00cd27af7c10b610fbf2711c22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fd49ed0ea7e83d0c1d72a33684977f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe5a1ca7a8f48a48ef807515db2e82.png)
温度 | ![]() | ![]() |
![]() | ![]() | ![]() |
![]() | ![]() | ![]() |
(1)通过表格中的数值可以推断:反应
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
(2)现有反应
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6919132633a2bf02545669297630485b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2345d59fbce28032a3e715963a9468d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6072e8448792f7f76695cf4022ef59.png)
(3)在相同温度下,根据反应
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2345d59fbce28032a3e715963a9468d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fd49ed0ea7e83d0c1d72a33684977f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe5a1ca7a8f48a48ef807515db2e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
(4)要使反应
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
A.增大压强 | B.体积不变时充入稀有气体 | C.升高温度 | D.使用合适的催化剂 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1959bd1cc850988d42e3ba733f734e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfdfaaec85ed94109cdfdb9fda205ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dd10c75ef9e20cac8696eb379e4927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5068f0071646a5294e8e5339ef2f486f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a862b820c5e5cf46c575b79167f2e6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ced3744778d44194a9911e2887cc2f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8800f1985bcb1f39552d857342eefa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5980ed3c1a6b576a2f5680657a8886a0.png)
【推荐3】氨和肼(N2H4)是氮的两种常见化合物,在科学技术和生产中有广泛应用。回答下列问题:
(1)已知:N2(g)+3H2(g)2NH3(g) ΔH=-92.4kJ·mol-1
在恒温、恒容的密闭容器中,合成氨反应的各物质浓度的变化曲线如图所示。
①计算在该温度下反应2NH3(g)N2(g)+3H2(g)的平衡常数K=
②在第25min末,保持其它条件不变,若将温度降低,在第35min末再次达到平衡。在平衡移动过程中N2浓度变化了0.5mol/L,请在图中画出25-40minNH3浓度变化曲线。
③已知:2N2(g)+6H2O(l)4NH3(g)+3O2(g)△H=+1530.0kJ/mol,则氢气的热值为
(2)① N2H4是一种高能燃料具有还原性,通常用NaClO与过量NH3反应制得,请解释为什么用过量氨气反应的原因:
②用NaClO与NH3制N2H4的反应是相当复杂的,主要分为两步:
已知第一步:NH3+ClO-=OH-+NH2Cl
请写出第二步离子方程式:
③ N2H4易溶于水,是与氨相类似的弱碱,已知其常温下电离常数K1=1.0×10-6,常温下,将0.2 mol/L N2H4·H2O与0.lmol/L,盐酸等体积混合(忽略体积变化)。则此时溶液的pH等于
元素 | 元素相关信息 |
![]() | 原子获得2个电子达到![]() |
![]() | 同周期主族元素中原子半径最大 |
![]() | 最高价氧化物既可以与酸反应,又可以与碱反应 |
![]() | 原子最外层电子数是![]() |
![]() | 原子核内所含质子数比![]() |
(1)W在元素周期表中的位置是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd761adabb370b069c974c20440d71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ecb1589c3cc179e2f62507020771e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12aa3df675dc85d4537c3d359121562f.png)
(3)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ecbb1cbe72beaa7d910e0f2220857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(4)无隔膜电解海水制
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7644a7769a5fa1bdab46cc0b2dee2861.png)
![](https://img.xkw.com/dksih/QBM/2011/6/3/1576014104469504/1576014104698880/STEM/ff42965c676e4029956501a2804ac07b.png?resizew=519)
已知:①Cu2O+2H+=Cu2++Cu + H2O;②当矿石中三氧化二铁含量太低时,可用硫酸和硫酸铁的混合液浸出铜; ③反萃取后的水层2是硫酸铜溶液。
回答下列问题:
(1)矿石用稀硫酸处理过程中发生反应的离子方程式为:Cu2O+2H+=Cu2++Cu + H2O
(2)将有机层和水层分离的操作方法叫
(3)“循环I”经多次循环后的水层1不能继续循环使用,但可分离出一种重要的硫酸盐晶体,该晶体的化学式是
(4)写出电解过程中(两电极都是惰性电极)阴极发生反应的电极反应式
(5)“循环Ⅲ”中反萃取剂的主要成分是
⑴NF3为无色、无味的气体,可用于微电子工业,该物质在潮湿的环境中易变质生成HF、NO、HNO3。该反应中氧化剂与还原剂的物质的量之比为
⑵汽车尾气中催化剂可将NO、CO转化成无害气体。
化学键 | C≡O | NO中氮氧键 | N≡N | CO2中C=O键 |
键能/kJ·mol1 | 1076 | 630 | 945 | 803 |
2NO(g)+2CO(g)⇌N2(g)+2CO2(g) ΔH
①ΔH=
②该反应的平衡常数与外界因素X(代表温度、压强、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532bed9c447613b26ea54a1558a710b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/cc39d7da-4997-4088-a0c4-2328856dd86c.png?resizew=267)
X是
⑶在一定温度和催化剂作用下,8NH3(g)+8NO(g)+2NO2(g)⇌9N2(g)+12H2O(g)在2L密闭容器中通入4molNH3、4molNO、nmolNO2,经10分钟时达到平衡时,c(NH3)=0.5mol·L1,c(NO2)=0.25mol·L1。
①n=
②υ(NO)=
③NH3的平衡转化率为
⑷用电解法将某工业废水中CN-转变为N2,装置如下图所示。电解过程中,阴极区电解质溶液的pH将
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/756d772b-cb02-4cf1-b38c-78ece080b6ad.png?resizew=359)