(1)常温时,0.1mol•L-1NH4Al(SO4)2溶液的pH=3。
①溶液中的Kw=
②溶液中c(NH
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74994fa846ff01d87548db6f34d3613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18816f9b3f9fde6e6b87d5ca93476073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74994fa846ff01d87548db6f34d3613.png)
(2)80℃时,0.1mol•L-1NH4Al(SO4)2溶液的pH小于3,分析导致pH随温度变化的原因是
(3)常温时,向100mL0.1mol•L-1NH4HSO4溶液中滴加0.1mol•L-1NaOH溶液,得到的溶液pH与NaOH溶液体积的关系曲线如图所示。
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/96d6e2a6-2fe2-4f70-b99e-84a274e66113.png?resizew=315)
①图中a、b、c、d四点中水的电离程度最大的是
②向NH4HSO4溶液中滴加NaOH溶液从a点到d点的过程中,发生反应的离子方程式
③NH4HSO4溶液中各离子浓度由大到小的排列顺序是
相似题推荐
甲:取纯度相同,质量、大小相等的锌粒于两支试管中,同时加入0.1 mol·L-1的 HA、HCl溶液各10 mL,按图装好,观察现象;
![](https://img.xkw.com/dksih/QBM/2010/11/13/1575988946976768/1575988947419136/STEM/6f17276ae52b42e19891aeea762fe0f1.png?resizew=142)
乙:① 用pH计测定物质的量浓度均为0.1 mol·L-1 HA和HCl溶液的pH;
② 再取0.1 mol·L-1的HA和HCl溶液各2滴(1滴约为1/25 mL)分别稀释至100 mL,再用pH计测其pH变化
(1)乙方案中说明HA是弱电解质的理由是:测得0.1 mol·L-1的HA溶液的pH
A.加入HCl溶液后,试管上方的气球鼓起快
B.加入HA溶液后, 试管上方的气球鼓起慢
C.加入两种稀酸后,两个试管上方的气球同时鼓起,且一样大
(2)乙同学设计的实验第
A. NaA固体(可完全溶于水) B.1 mol·L-1 NaOH溶液
C. 1 mol·L-1 H2SO4 D.2 mol·L-1 HA
(3)pH=1的两种酸溶液A、B各1 mL,分别加水稀释到1000 mL,其pH与溶液体积V的关系如图所示,则下列说法不正确的有
![](https://img.xkw.com/dksih/QBM/2010/11/13/1575988946976768/1575988947419136/STEM/1d2996845d4e49c28bff05c3fba7d190.png?resizew=245)
A.两种酸溶液的物质的量浓度一定相等
B.稀释后,A酸溶液的酸性比B酸溶液弱
C.若a=4,则A是强酸,B是弱酸
D.若1<a<4,则A、B都是弱酸
E.稀释后A溶液中水的电离程度比B溶液中水的电离程度小
Ⅰ.化学家研究发现,SbF5能将MnF4从离子[MnF6]2-的盐中反应得到,SbF5转化成稳定离子[SbF6]-的盐。而MnF4很不稳定,受热易分解为MnF3和F2。根据以上研究写出以K2MnF6和SbF5为原料,在 423 K 的温度下制备F2的化学方程式:
现代工业以电解熔融的氟氢化钾(KHF2)和氟化氢(HF)混合物制备氟单质,电解制氟装置如图所示。
已知KHF2是一种酸式盐,写出阴极上发生的电极反应式
Ⅱ.①卤化氢的熔沸点随相对分子质量增加而升高,而HF熔沸点高于HCl的原因是
②已知25 ℃时,氢氟酸(HF)的电离平衡常数Ka=3.6×10-4。
某pH=2的氢氟酸溶液,由水电离出的c(H+)=
③又已知25 ℃时,溶度积常数Ksp(CaF2)=1.46×10-10。现向1 L 0.2 mol/L HF溶液中加入 1 L 0.2 mol/L CaCl2 溶液,通过列式计算说明是否有沉淀产生:
弱酸 | ![]() | ![]() | ![]() |
电离平衡常![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d384aceb0fcad8592d8e2b6fc340199e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37af79432305f25fc2a353e231b93746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37af79432305f25fc2a353e231b93746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d384aceb0fcad8592d8e2b6fc340199e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e38f492eda9905b962dfbfc36feef0.png)
(2)同浓度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67e2df8a0979d4ab29fccef7f16216a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3e803e5cc9649df47289d5c8c60474.png)
(3)体积相同、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347c2f97373ec84da6048a5601228ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e06b60f5d0be1cd442c0065e4c794b76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35fda4b631131b7771644179495ed52a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/387d2029bc8e5f0ceb454be937a07e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce93086f0133444d40743d654cba1c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce93086f0133444d40743d654cba1c55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/bbc5103c-f031-44c2-b0a5-c959b6b84f59.png?resizew=463)
(1)人体血液呈弱碱性的原因是
(2)从平衡角度解释人体血液pH稳定的原因
(3)当人体代谢性酸中毒严重时,需要血液透析治疗。
①预测“酸中毒”时表1“结果浓度”有可能会有哪些变化:
②配制某浓缩透析液需要用到的溶质有:0.7mol/LNaCl,0.01mol/LKCl,0.075mol/LCaCl2和0.15mol/LNaHCO3,直接混合各溶质会有沉淀
③医院透析液分两瓶存放,使用时稀释再混合。其中一瓶为NaHCO3,下列说法正确的是
A.c(Na+)>c(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990ea0fd806f2a823c908705100860e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990ea0fd806f2a823c908705100860e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ebef177e58b125407e6e072daebae.png)
C.c(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ebef177e58b125407e6e072daebae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990ea0fd806f2a823c908705100860e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ebef177e58b125407e6e072daebae.png)
(4)常温下,反应CaCO3(s)+2F-(aq)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4ac184aef047428370bf877105fa50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ebef177e58b125407e6e072daebae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea6b9de5768ea3f3fb199dfb22c8810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://img.xkw.com/dksih/QBM/2020/2/24/2406048307396608/2407237665382400/STEM/504bd338-93f3-4cf5-8a9a-4ea18576325a.png?resizew=403)
![](https://img.xkw.com/dksih/QBM/2020/2/24/2406048307396608/2407237665382400/STEM/16ef813f-28a3-401f-93e4-213f43a6132e.png?resizew=409)
(1)采用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b19600fb8d06983942d1c1b640c1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513b756f96b8132eb53861ef5624e207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8b6156dd09a93e3585f0d688d93765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cc999495f37f85c75baa9fd2139fdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f9abdc1c98f0c92cd1be61494c56b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893eca18b10dc351e28577f4c192f439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fec8f37b23f03e5181e49224996318d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788f4e225e6c2b6a043d98827de64199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83678e1f82227be67c3e1c314b5ce750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f37089f7cd89fc44c8fd6071a02ebf09.png)
则反应
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2312149c950d35246ef7590c4c03766f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d57f18a2576c18f4829b8220f50efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e522d52651f42ef602f1b91ded39f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaafc429a22e392001591d5834da80b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8846d7ea69d6f5842929f792136a704c.png)
(2)采用氨水烟气脱硫,最终可得到氮肥.将相同物质的量的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe2066525aa0616cf44d051d57bf713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5dd440f1771d42e0b4bdbf28333356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4648c7c84472eae18fb816cbcb0fb7df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991f5c572d132e8e723e9d518ba1b383.png)
C.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f354cb2a7f1638fd135f7d5a90b74a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb10652f0f8be2cc05df3a2ca22d60b7.png)
(3)烟气在较高温度经如图1方法脱除
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabf3433f95b16485024c4eede9f2a50.png)
①在阴极放电的物质是
②在阳极生成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdde992f77a7036a2f0b21d52ddd043.png)
③已知室温下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e6491b484f76bbe933b6202d165074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabf3433f95b16485024c4eede9f2a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef1afc0f650422fdd7bca87cde7fef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabf3433f95b16485024c4eede9f2a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a2af9b1ec113a3c42dc7f85117cf64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab8146648c6ae4c6059b111dc850881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a316322ef211c0f478232054b070466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab8146648c6ae4c6059b111dc850881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabf3433f95b16485024c4eede9f2a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a5084847fb42b07b32e03a725c2c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3514c22cedaac57e412128b9de8a42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4d9129b79ac985bc46c88b092aeb02.png)
(4)一定条件下,用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd64433131ff93fd151abc85cfe05dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69543ac78059865fd90c1987b7f221b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c4f431f30c365de0108959ed4419dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c054788f56cc90c72b71d97bf85645ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7b570d732b5e8f4db3e0cf4842e7db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea01214b6b9edbefe76f70cb5da15684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79338556e83810d43f02476d04ee3907.png)
选择该催化剂的理由是:
某科研小组用选择的催化剂,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6eb805952f6eac89e676258120b184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8041cd9293e70b569bc573ab9b3334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218e86187bfe11e6988d157fa9feffa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6200aa9357b208a994c93c210ff60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d61a03fe9d64c1127722594464ad3dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8041cd9293e70b569bc573ab9b3334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3c98903dccf85fed0595b5ab284c48.png)
A.在250 mL的容量瓶中定容配成250mL烧碱溶液
B.用移液管移取25 mL烧碱溶液于锥形瓶中并滴几滴指示剂甲基橙
C.在天平上准确称取烧碱样品Wg,在烧杯中用蒸馏水溶解
D.将物质的量浓度为c的标准盐酸溶液装入酸式滴定管,调节液面,记下开始读数为V1
E.在锥形瓶下垫一张白纸,滴定至终点,记下读数V2
回答下列各问题:
(1)正确操作步骤的顺序是(用字母填写)
(2)D步骤中液面应调节到
(3)滴定终点时锥形瓶中颜色变化是
(4)若酸式滴定管不用标准盐酸润洗,在其他操作均正确的前提下,会对测定结果(指烧碱的纯度)有何影响?
(5)该烧碱样品纯度的计算式为
Ⅱ. (1)常温下,0.2 mol/L HCl溶液与0.2 mol/L MOH溶液等体积混合(忽略混合后溶液体积的变化),测得混合溶液的pH=6,则①混合溶液中由水电离出的c(H+)
②求出混合溶液中下列算式的精确计算结果(填具体数字)。
c(Cl-)-c(M+)=
(2)常温下若将pH=3的HR溶液与pH=11的NaOH溶液等体积混合,测得混合溶液的pH≠7,则混合溶液的pH
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7889f265b1bac6f19624eb93f5dbdc.png)
化学式 | ![]() | ![]() | ![]() |
电离平衡常数 | ![]() | ![]() ![]() | ![]() |
(1)一般情况下,当温度升高时,电离平衡常数K
(2)下列四种离子结合质子能力最强的是___________(填字母)。
A.![]() | B.![]() | C.![]() | D.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04aa448e5337f64e5d6464f39d248542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59cac57ea6345e7ffc25e81b96090bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631df722e46062d187fbc1e1d4615efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1066e53bf79a3cdff7ec2934bd09e272.png)
![](https://img.xkw.com/dksih/QBM/2021/11/16/2852457387900928/3064241085448192/STEM/85ece758555b4a7794f35df57a300177.png?resizew=189)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59cac57ea6345e7ffc25e81b96090bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59cac57ea6345e7ffc25e81b96090bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec61de0887d901937accf74bd8b1c76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec61de0887d901937accf74bd8b1c76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce93086f0133444d40743d654cba1c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce93086f0133444d40743d654cba1c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59cac57ea6345e7ffc25e81b96090bc.png)
(4)常温下,用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce93086f0133444d40743d654cba1c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889220d0a5054f0df8fdb14fec5409b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b3c8542f61e24e199d933e485da4042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5839df8da8b3ec40435c33ab6e8e2b.png)
(5)已知某二元弱酸
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce8c43b59ab570e8fe06030e000e625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af331f6a1a58192a4b6752f0d5e195e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b034afaeafa65a5f51f208511926cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f03d833b1baf20833b405e2011dcdba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
(1)海水中溶解一定量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d072177ae1481125f96741e1c53815cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fb7a913ffabeaf085c834faa2d7633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef0aaf9f3442509a859fb2f9a07ca7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d066ee1323c758ce2ca577f7b5037dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5533a64f801adeabf53d192906e951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52db9e787c515500701f6f34344a595b.png)
①海水的弱碱性(pH约为8.1)有利于维持海洋生态环境,请用离子方程式解释海水呈弱碱性的原因
②炎炎夏日,海水的pH会
③随着人类活动的影响,过量的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/f3163cd4-494c-44df-96ed-ff33026e4839.png?resizew=236)
a室电极反应方程式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
(2)“碳捕捉技术”可实现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/c1a27112-4f70-4d52-8418-44c25d2da268.png?resizew=299)
已知:25℃时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/659105f337cf41cb6411ff0c9ea2c249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafa1f8e95c2b692dfa01104fe0dbcc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6815e428b29f034dfb2f49e71b775ef0.png)
溶液中含碳物种的浓度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662f1fafe752486e135b465e9ff401ba.png)
④若忽略溶液体积的变化,以0.1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4d9129b79ac985bc46c88b092aeb02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e71c86dcd9a9e9b09bbbb65b9d313435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ee7fd65bfbeb154dd32f6707f72179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae122d781fb5c64f82503cbb2823f4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25e9f3a5c68b2b14f75bd0d0db867ec.png)
⑤整个流程中,可循环利用的物质有
(1)汽车尾气净化的主要原理为2NO(g)+2CO(g)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a55d09eb14ce32c34588667f973496d.png)
①在一定条件下,在一个容积固定为2L的密闭容器中充入0.8mol NO和1.20mol CO,开始反应至3 min时测得CO的转化率为20%,则用N2表示的平均反应速率为v(N2)=
②对于气相反应,用某组分(B)的平衡压强(pB)代替物质的量浓度(cB)也可以表示平衡常数(记作Kp),则该反应平衡常数的表达式Kp=
③该反应在低温下能自发进行,该反应的ΔH
(2)使用甲醇汽油能减少汽车尾气对环境的污染,某化工厂用水煤气为原料合成甲醇,在恒温恒压条件下的密闭容器中发生反应:CO(g)+2H2(g)⇌CH3OH(g),到达平衡时,测得CO、H2、CH3OH分别为1mol、1mol、1mol,容器的体积为3L,现往容器中继续通入3molCO,此时v(正)
(3)已知:H2A=H++HA-,HA-⇌H++A2-。常温下,0.1 mol·L-1的NaHA溶液其pH=2,则0.1 mol·L-1的H2A溶液中氢离子浓度的大小范围是
(4)常温时,Fe(OH)3的Ksp=1×10-38,要使溶液中的Fe3+沉淀完全[残留在溶液中的c(Fe3+)<10-5 mol·L-1],则溶液的pH应大于