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了解一下酸度计有哪些概念
点击次数:93 发布时间:2019-12-07
   酸度计是指用来测定溶液酸碱度值的仪器。pH计是利用原电池的原理工作的,原电池的两个电极间的电动势依据能斯特定律,既与电极的自身属性有关,还与溶液里的氢离子浓度有关。

  YUANDIANCHIDEDIANDONGSHIHEQINGLIZINONGDUZHIJIANCUNZAIDUIYINGGUANXI,QINGLIZINONGDUDEFUDUISHUJIWEIpHZHI。pHJISHIYIZHONGCHANGJIANDEFENXIYIQI,GUANGFANYINGYONGZAINONGYE、HUANBAOHEGONGYEDENGLINGYU。TURANGpHZHISHITURANGZHONGYAODEJIBENXINGZHIZHIYI。ZAIpHCEDINGGUOCHENGZHONGYINGKAOLVDAICERONGYEWENDUJILIZIQIANGDUDENGYINSU。

  下面让我们来了解一下酸度计有哪些概念吧。

彩经网  SHENMESHIpH?pHSHILADINGWEN"Pondus hydrogenii"YICIDESUOXIE(Pondus=YAQIANG、YALIhydrogenium=QING),YONGLAILIANGDUWUZHIZHONGQINGLIZIDEHUOXING。ZHEIYIHUOXINGZHIJIEGUANXIDAOSHUIRONGYEDESUANXING、ZHONGXINGHEJIANXING。SHUIZAIHUAXUESHANGSHIZHONGXINGDE,DANBUSHIMEIYOULIZI,JISHIHUAXUECHUNSHUIYEYOUWEILIANGBEILIJIE:YANGEDIJIANG,ZAIYUSHUIFENZISHUIHEZUOYONGYIQIAN,QINGHEBUSHIYIZIYOUTAICUNZAI。

彩经网  H2O+ H2O=H3O+ OHˉ,YOUYUSHUIHEQINGLIZI(H3O)DENONGDUSHIYUQINGLIZI(H)NONGDUDENGTONGKANDAI,SHANGSHIKEYIJIANHUACHENGXIASHUCHANGYONGDEXINGSHI:

  H2O=H+ OHˉ

彩经网  CICHUZHENGDEQINGLIZI,RENMENZAIHUAXUEZHONGBIAOSHIWEI"HLIZI"HUO"QINGHE"。SHUIHEQINGHEBIAOSHIWEI"SHUIHEQINGLIZI"。FUDEQINGYANGGENLIZICHENGWEI"QINGYANGHUAWULIZI"。

  LIYONGZHILIANGZUOYONGDINGLV,DUIYUCHUNSHUIDELIJIEKEYIZHAODAOYIPINGHENGCHANGSHUJIAYIBIAOSHI:

彩经网  K=H3O×OH----H2O

  YOUYUSHUIZHIYOUJISHAOLIANGBEILIJIE,YINCISHUIDEZHILIANGMOERNONGDUSHIJIWEIYICHANGSHU,BINGQIEYOUPINGHENGCHANGSHUKKEQIUCHUSHUIDELIZIJIKW。

  KW=K×H2O KW= H3O·OH-=10·10=10mol/l(25℃)

彩经网  YEJIUSHISHUODUIYUYISHENGCHUNSHUIZAI25℃SHICUNZAI10MOERH3OLIZIHE10MOEROHˉLIZI。

  ZAIZHONGXINGRONGYEZHONG,QINGLIZIHHEQINGYANGGENLIZIOHˉDENONGDUDOUSHI10mol/l。RU:

  JIARUYOUGUOLIANGDEQINGLIZIH,ZERONGYECHENGSUANXING。SUANSHINENGSHISHUIRONGYEZHONGDEQINGLIZIHYOULIDEWUZHI。TONGYANG,RUGUOSHIOHˉLIZIYOULI,NEIMERONGYEJIUSHIJIANXINGDE。SUOYI,JICHUHZHIJIUZUYIBIAOSHIRONGYEDETEXING,CHENGSUANXINGHAISHIJIANXING,WEILEMIANYUYONGCIFENZINONGDUFUMIZHISHUJINXINGYUNSUAN,SHENGWUXUEJIAZELUNSEN(Soernsen)ZAI1909NIANJIANYIJIANGCIBUBIANSHIYONGDESHUZHIYONGDUISHUDAITI,BINGDINGYIWEI"pHZHI"。

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