Kuv yuav npaj cov tshuaj tiv thaiv li cas rau cov electrodes ntawm pH meter?
Lub pH electrode ntawm 3mol / L KCL tov pH meter yog tiv thaiv los ntawm kev tiv thaiv cov tshuaj nyob rau hauv lub sheath ua ntej siv, thiaj li yuav tswj tau nws cov qub pH muaj peev xwm sib npaug thiab xyuas kom meej qhov ntsuas ntau dua. Ntawm no yog cov tshuaj tiv thaiv rau pH electrode, uas yog 3mol / L KCL tov. Yog li koj yuav tsum kawm yuav ua li cas kho nws tus kheej, tsau pH electrode hauv kev tiv thaiv kev daws teeb meem, kom nws tuaj yeem rov qab kho nws cov haujlwm sai thiab ntsuas tau zoo. Cov hauv qab no yog cov kauj ruam rau kev npaj pH meter tiv thaiv kev daws teeb meem -3mol/L KCL tov:
1. Kev suav: Yog tias cov molar loj ntawm KCL yog 74.5g / moL, ces KCL hnyav =3mol × 74.5g / mol=223.5g;
2. Qhov hnyav: Siv qhov ntsuas qhov ntsuas kom hnyav KCL=223.5g, xyuam xim rau kev siv qhov ntsuas qhov ntsuas;
3. Dissolve: Dissolve tag nrho nyob rau hauv 100ml ntawm distilled dej nyob rau hauv ib tug beaker thiab do nrog ib tug iav pas nrig;
4. Hloov thiab ntxuav: Hloov cov tshuaj yaj mus rau hauv 1000ml ntim ntim nrog lub qhov qhib qhib. Ceeb Toom: Txhawm rau tiv thaiv cov tshuaj los ntawm kev nchuav tawm thiab tsis txhob cia cov kua dej ntws los ntawm lub raj mis phab ntsa saum cov nplai kab, siv lub iav pas nrig kom ntws dej. Txhawm rau kom ntseeg tau tias tag nrho cov kua dej raug xa mus rau lub khob ntim ntim ntau npaum li qhov ua tau, lub raj mis thiab iav pas nrig yuav tsum tau ntxuav nrog dej distilled ob lossis peb zaug, thiab cov tshuaj tom qab txhua qhov ntxuav yuav tsum tau txhaj rau hauv lub khob ntim. Maj mam co lub khob ntim ntim kom sib tov kom huv si. (Siv lub iav pas nrig rau cov kua dej)
5. Qhov ntim tsis tu ncua: Thaum ntxiv dej rau qhov tob ntawm 2-3 centimeters nyob ze ntawm lub cim, siv lub taub ntim roj hmab los ntxiv cov dej distilled rau lub cim. Thaum teeb tsa lub ntim, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov qis tshaj ntawm cov kua dej ntawm cov kua dej yuav tsum yog tangent mus rau qhov ntsuas kab, thiab cov kab ntawm qhov muag ntawm qhov muag yuav tsum yog kab rov tav mus rau qhov ntsuas kab. Tsis txhob saib los yog nce, txwv tsis pub nws yuav ua rau yuam kev.
6. Co kom zoo: Yog tias qhov concentration ntawm cov tshuaj tsis sib npaug tom qab ncav cuag ib lub ntim, lub khob ntim ntim yuav tsum tau muab kaw kom nruj. Siv koj tus ntiv tes ntsuas los tuav lub stopper, thiab siv tus ntiv tes ntawm koj txhais tes tuav hauv qab ntawm lub khob. Hloov thiab co lub khob ntim ntim ntau zaus kom sib tov cov tshuaj sib npaug.
7. Co cov tshuaj KCL mus rau lub ntim tas li. Ncuav cov tshuaj npaj rau hauv lub raj mis reagent, cap lub raj mis nrog ib tug stopper, thiab sau nws. Qhov kev daws teeb meem yog 3mol / L KCL tov. Lub calibration tsis rau pH meters kuj muaj nws tus kheej configuration txoj kev, tab sis feem ntau ntawm lawv yog bagged reagents nrog yooj yim configuration, uas kuj yuav yuav nyob rau hauv lub khw.
