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单选题相同质量摩尔浓度的下列电解质溶液,离子平均活度因子最小的是( )

A. ZnSO4

B. CaCl2

C. KCl

D. NaCl

物理化学80平台课程封面

学科：物理化学80平台

时间：2026-04-13 11:50:41

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<img src="https://tihai-oss-cloud.itihey.com/img/5f0f9a32ac70ec8aeef400bb1171a1a3.png">的<img src="https://tihai-oss-cloud.itihey.com/img/c67e57e6757f131ea2bc3e66cea3d302.png">溶液的离子强度为( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/6f0d9818f138f429e48886788117ef30.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/36b97fb26362413cd96a70cee0a51cd7.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/140f8d42cf3889e758af49b1b7aed0b0.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/840171cfffe25590637bbf0ebb3a840a.png">

298K时,有浓度均为<img src="https://tihai-oss-cloud.itihey.com/img/8a6932bebe393290583a5bb49e76e677.png">的下列电解质溶液,其离子平均活度系数<img src="https://tihai-oss-cloud.itihey.com/img/9495c5599fbbb57a4bdcf629b0dac29a.png">最大的是( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/b6faf2f7a30598b8b47a9afd3bf1d258.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/ff66e78a13168ca909f9b0bf2e011d62.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/2dd7670b88eab25bbe9c2c62e2da9b4e.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/87cf1cf402a02324147834b1514b557e.png">

相同质量摩尔浓度的下列电解质溶液,离子平均活度因子最小的是( )

A. ZnSO4B. CaCl2C. KClD. NaCl

已知<img src="https://tihai-oss-cloud.itihey.com/img/ea8897b2130102f4b2fd80be7adfb791.png">的电极电势<img src="https://tihai-oss-cloud.itihey.com/img/7c9608a1e2365f4f229a5ba2eb18b186.png">,<img src="https://tihai-oss-cloud.itihey.com/img/541992d339aba7da2f49ce4bf0f735ec.png">的<img src="https://tihai-oss-cloud.itihey.com/img/b5952122cf82290f4fc8cfc648c176d7.png">,则电极<img src="https://tihai-oss-cloud.itihey.com/img/351982317e4d44f4f8400c67d2266fde.png">的电极电势<img src="https://tihai-oss-cloud.itihey.com/img/1c4b5cde86778bf120ab1216f9aaa636.png">为( )

A. 0.305VB. 0.721VC. 0.914VD. 1.586V

Na2SO4水溶液中,平均离子活度因子与离子活度因子的关系为( )

A. γ± = (<img src="https://tihai-oss-cloud.itihey.com/img/32ea2d5c1813220291259fe383d8bbe6.png">)1/3B. γ± = (γ+γ-)1/2C. γ± = (<img src="https://tihai-oss-cloud.itihey.com/img/32ea2d5c1813220291259fe383d8bbe6.png">)1/2D. γ± = (γ+γ-)1/3

在298K时,浓度为0.1和<img src="https://tihai-oss-cloud.itihey.com/img/3f066241d93180788aeb1759079c6b73.png">的HCl溶液的液接电势为<img src="https://tihai-oss-cloud.itihey.com/img/a5064d1af20427b075338223185f829c.png">,浓度相同而换用KCl溶液,其液接电势为<img src="https://tihai-oss-cloud.itihey.com/img/1edecbeba5d073b44b1d3677d169a7d5.png">,两者关系为( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/a5064d1af20427b075338223185f829c.png">><img src="https://tihai-oss-cloud.itihey.com/img/1edecbeba5d073b44b1d3677d169a7d5.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/a5064d1af20427b075338223185f829c.png"><<img src="https://tihai-oss-cloud.itihey.com/img/1edecbeba5d073b44b1d3677d169a7d5.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/a5064d1af20427b075338223185f829c.png">=<img src="https://tihai-oss-cloud.itihey.com/img/1edecbeba5d073b44b1d3677d169a7d5.png">D. 无法判断

<img src="https://tihai-oss-cloud.itihey.com/img/67f7e4a04bc72c632d6849574fcdea5e.png">,该反应可通过爆炸反应完成,也可通过氢氧可逆电池完成,两者的焓变分别为<img src="https://tihai-oss-cloud.itihey.com/img/8bb051820f5dbaf63fb0a8c00cd03670.png">(1)和<img src="https://tihai-oss-cloud.itihey.com/img/8bb051820f5dbaf63fb0a8c00cd03670.png">(2),若反应物与生成物的T,p均相同,则两个焓变的关系( )

A. <img src="https://tihai-oss-cloud.itihey.com/img/8bb051820f5dbaf63fb0a8c00cd03670.png">(1) = <img src="https://tihai-oss-cloud.itihey.com/img/8bb051820f5dbaf63fb0a8c00cd03670.png">(2)B. <img src="https://tihai-oss-cloud.itihey.com/img/8bb051820f5dbaf63fb0a8c00cd03670.png">(1) > <img src="https://tihai-oss-cloud.itihey.com/img/8bb051820f5dbaf63fb0a8c00cd03670.png">(2)C. <img src="https://tihai-oss-cloud.itihey.com/img/8bb051820f5dbaf63fb0a8c00cd03670.png">(1) <<img src="https://tihai-oss-cloud.itihey.com/img/8bb051820f5dbaf63fb0a8c00cd03670.png"> (2)D. 无法确定

下列两电池反应的标准电动势分别为<img src="https://tihai-oss-cloud.itihey.com/img/62279f228d1075b738eac0b2e3b976e2.png">,则两个<img src="https://tihai-oss-cloud.itihey.com/img/c666cc69559c8b5407e28c5b22942a0c.png">的关系为( ).(1)<img src="https://tihai-oss-cloud.itihey.com/img/cfcc82fcc0d10118334cda91a84f23ff.png">(2)<img src="https://tihai-oss-cloud.itihey.com/img/4e10f6a9908b8a9e330b4ab86a14d7b8.png">

A. <img src="https://tihai-oss-cloud.itihey.com/img/c88bb66d0aca6fdc90472cfd8832d8c2.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/d9f3be381cf23d67b6545bafb51ed055.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/676e5381253a44092d861dae8ebcc919.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/d33b3a834823ad4a580ca4f33cb22d5a.png">

298K时有如下两个反应(1)<img src="https://tihai-oss-cloud.itihey.com/img/471da2e0b3e74bf96419232d45e1b45b.png">(2)<img src="https://tihai-oss-cloud.itihey.com/img/232a0558052c5da356313addba4439e5.png">两个电池的电池反应都可写成<img src="https://tihai-oss-cloud.itihey.com/img/4efdc6bd02d2fe7b3bfdc88c9d10fced.png">则两个电池的<img src="https://tihai-oss-cloud.itihey.com/img/c666cc69559c8b5407e28c5b22942a0c.png">和<img src="https://tihai-oss-cloud.itihey.com/img/9e2659306e0e8626eadaf6820655c8c3.png">之间的关系为( )

A. 都相同B. <img src="https://tihai-oss-cloud.itihey.com/img/c666cc69559c8b5407e28c5b22942a0c.png">不同 <img src="https://tihai-oss-cloud.itihey.com/img/9e2659306e0e8626eadaf6820655c8c3.png">相同C. 都不同D. <img src="https://tihai-oss-cloud.itihey.com/img/9e2659306e0e8626eadaf6820655c8c3.png">不同 <img src="https://tihai-oss-cloud.itihey.com/img/c666cc69559c8b5407e28c5b22942a0c.png">相同

温度T时,b = 0.5 mol∙kg-1的Al2(SO4)3的离子平均活度因子γ± = 0.75,则Al2(SO4)3的活度a[Al2(SO4)3] = ( )

A. 1.275B. 0.801C. 0.965D. 0.7996

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