德州牛仔

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氮吹仪价格方便而准确地求得在

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德州牛仔 GONGZUOSHIJIAN:ZHOUYIZHIZHOUWU 8:00-18:00

[MnO][H+] 2+ 2[Mn] AgCl(s)+eAg(s)+Cl E(AgCl/Ag)=E砓(AgCl/Ag)+ 0.059Vlg1 1[Cl]   (3)利用标准电极电位表和能斯特方程,可以氮吹仪德州牛仔价格方便而准确地求得在任意指 定状态下某电极的电位值。   例310 计算在298K时,由锌板浸入0.001mol·dm3硫酸锌溶液中组成的Zn2+/Zn 电极的电极电位值。   解:电极反应方程式为:  Zn2+(0.001mol·dm3)+2eZn(s) 查表34得Zn2+/Zn电极的标准电极电位: E砓(Zn2+/Zn)=0.76V 按电极反应式,可写出该电极在298K时的能斯特方程: 2+ E(Zn2+/Zn)=E砓(Zn2+/Zn)+ 0.059Vlg [Zn] 21 根据题意可知,Zn2+离子的相对浓度为: [Z2+]=01mo·m3c砓01mo·m31mo·m3001 n.0 00ld/=.0 00ld/ld=.0 所以电极在标准状态下的电极电位为: E(Zn2+/Zn)=E砓(Zn2+/Zn)+ 0.059Vlg[Zn2+] 2 0.059V =0.76V+ 2lg


德州牛仔 (0.0 001) =0.85V   LI311 JIANGXIFUO2(g)YIDAPINGHENGDEYANGQIDIANJI(O2DEFENYAWEI100kPa)CHARUOHLIZINONG DUWEI0.10mol·dm3DERONGYEZHONG,JIZUCHENGLEO2/OHDIANJI。SHIQIUZAI298KSHI,GAIO2/OHDIANJIDEDIAN WEIZHI。   JIE:DIANJIFANYINGWEI: O2(10 00kaH2e010mo·m3 P)+2O+44OH(.ld) CHABIAO34DEO2/OHDIANJIZAI298KSHIDEBIAOZHUNDIANJIDIANWEI: EZHE(O2/OH)=0.40V ANDIANJIFANYINGFANGCHENGSHIXIECHUGAIDIANJIZAI298KSHIDENENGSITEFANGCHENG: 104DISANZHANG RONGYEZHONGDEHUAXUEPINGHENG  E(O2/OH)=EZHE(O2/OH)+ 0.059Vlgp(O2) 44[OH] GENJUTIYIKEZHI,O2QITIDEXIANGDUIFENYAWEI: p(O2)=100kPa/pZHE=100kPa/100kPa=1 OHLIZIDEXIANGDUINONGDUWEI: [OH]=01ld3/ZHE=.0mo·m31mo·m301 .0mo·mc01ld/ld=.0 SUOQIUO2/OHDIANJIZAIZHIDINGTIAOJIANXIADEDIANJIDIANWEIWEI: E(O/OH)=EZHE(O/OH)+0.059Vlgp(O2) 224[OH]4 =0.40V+ 0.059Vlg1 4(0.1


德州牛仔 0)4=0.40V+0.059V=0.459V≈0.46V   CONGSHANGSHULIANGGELIZIKEYIKANCHU:   ①XIANGGUANDEDIANJIFANYINGWUZHIDENONGDUDEBIANHUAMINGXIANDIYINGXIANGDAODIANJIDIANWEIDEDAXIAO。JUE ZHE DINGDIANJIDIANWEIGAODIDEZHUYAOYINSUBUSHIXIANGGUANWUZHIDENONGDU,ERSHIQIBIAOZHUNDIANJIDIANWEIZHIE, JIZUCHENGDIANJIDEDIANDUIDEBENXING。XIANGGUANLIZINONGDUDEBIANHUADUIDIANJIDIANWEIDEYINGXIANG,YIBANYAOXIAO ZHEZHE YUE。DANSHITONGCHANGQINGKUANGXIADIANJIDEZUCHENGSHIZHIDINGDE,QIEYISHIDINGZHI,ZHEISHIYAOGAIBIANSHIJI DEDIANJIDIANWEI,ZONGSHITONGGUOGAIBIANXIANGYINGWUZHIDENONGDULAISHIXIANDE。   ②DANGMn+/MDIANJIZHONGJINSHULIZINONGDUJIANGDISHI,JINSHUJIANGGENGYIYUSHIQUDIANZI,YANGHUACHENG JINSHULIZIERJINRURONGYEZHONG。SHIMn+/MDIANJIDEDIANWEIJIANGDI(DIANWEIDAISHUZHIJIANXIAO)。   ③DANGA/ADIANJIZHONGFEIJINSHULIZINONGDUJIANGDISHI,FEIJINSHUJIANGGENGYIYUDEDAODIANZI,HAIYUAN CHENGFEIJINSHULIZIERJINRURONGYEZHONG,SHIA/ADIANJIDEDIANWEISHENGGAO(DIANWEIDAISHUZHIZENGDA)。   LI312 ZAI298KSHI,JIANGYINBANGCHARUNONGDUWEI1mol·dm3DEAgNO3RONGYEZHONG,ZAIJIARUZULIANGDE KClSHISHENGCHENGAgClCHENDIAN,JIZUCHENGLEYIGEAgCl/AgDIANJI(JIAgA