Nqe Lus Nug 1: Vim li cas cov txheej txheem daws teeb meem ntawm sodium hydroxide yuav tsum tau ntsuas nrog cov ntaub ntawv siv tom qab tau npaj lawm?
Cov kev daws teeb meem yog cov ntsiab lus ua ntej, thiab tus nqi concentration tseem tsis tau mus txog tus nqi tiag. Txhawm rau ua kom cov concentration ntawm titrant ze rau tus nqi tiag tiag, nws yuav tsum tau ntsuas nrog cov khoom siv siv.
Tsis tas li ntawd, vim hais tias sodium hydroxide yog ib qho yooj yim rau deliquescence nyob rau hauv cov huab cua, kev ua yuam kev yuav tshwm sim nyob rau hauv tus txheej txheem ntawm hnyav cov khoom sodium hydroxide thiab configuring sodium hydroxide tov.
Nqe Lus Nug 2: Dab tsi yuav tsum tau them sai sai rau thaum ntsuas sodium hydroxide tus qauv daws teeb meem
Thawj kauj ruam: thaum npaj cov tshuaj saturated sodium hydroxide, hnyav 110 grams ntawm sodium hydroxide, dissolve nws nyob rau hauv 100 ml ntawm carbon dioxide-dawb dej, do raws li nws yog ntxiv, thiab co nws mus txog rau lub dissolution. Nyob rau hauv lub raj mis reagent, kaw nws nrog ib tug roj hmab stopper, thiab cia nws sawv ntsug rau ntau tshaj 7 hnub kom cov sodium carbonate nag lossis daus tag. Noj me ntsis ntshiab saturated sodium hydroxide tov, dilute nrog dej, ntxiv 1 ml ntawm saturated barium hydroxide tov, tsis muaj turbidity tshwm sim nyob rau hauv kaum feeb, qhia tau hais tias cov sodium carbonate tau tag nrho precipitated.
Ua li no, cov kua saturated uas ua tau raws li qhov yuav tsum tau muaj tuaj yeem tau! Qhov no kuj yog thawj kauj ruam hauv kev tsim cov txheej txheem zoo ntawm sodium hydroxide!
Kauj Ruam 2: Npaj cov tshuaj: Siv 0.1mol/L ua piv txwv, tus qauv qhia tias 5.4 ml ntawm cov tshuaj saturated yuav tsum tau kos los npaj cov tshuaj 0.1mol/L. Nyob rau hauv kev pom ntawm cov kev cai hais tias qhov kev ua yuam kev ntawm tus nqi tiag tiag ntawm cov qauv kev daws teeb meem thiab cov nqi teev tseg yuav tsum nyob rau hauv 5 feem pua, nws yuav tsum tau nqus nruj raws li qhov yuav tsum tau ua. Txawm li cas los xij, rau qee qhov laj thawj, qhov cuam tshuam ntawm qhov ntim hloov pauv tuaj yeem ua rau muaj qhov yuam kev los tiv thaiv tus qauv kev daws teeb meem ntawm 0.09**** los ntawm qee zaum tshwm sim. Peb feem ntau kos 5.6 ml rau 1L ntawm kev daws, (qhov kawg tshwm sim feem ntau yog nyob ib ncig ntawm 0.102)! Tom qab kev npaj tiav, co nws zoo, thiab co nws tom qab ib lub sij hawm los xyuas kom meej tias cov kev daws teeb meem yog uniform thiab ruaj khov! Feem ntau txhua hnub, calibration yog nqa tawm!
Lo lus nug: Qee lub sij hawm qhov concentration ntawm {{0}}.09756 yog qhov kev zam, uas yuav ua rau muaj teeb meem tsis tsim nyog, xws li muaj pes tsawg tus lej tseem ceeb? Tus txheej txheem teev tseg tias 4 yog tshwj tseg raws li tus lej tseem ceeb, thiab qhov kawg tshwm sim yuav tsum yog 0.0976 lossis 0.09756. (Thawj tus lej thaum pib yog 8 lossis 9 tuaj yeem suav ua tus lej tseem ceeb)
Thiab tseem muaj qee qhov teeb meem rau kev suav yav tom ntej, yog li koj yuav tsum tau sim kom tsis txhob muaj txiaj ntsig zoo li no!
Kauj ruam 3: Calibration.
Potassium hydrogen phthalate yuav tsum tau qhuav kom huv si, thiab nws yuav tsum tau shaken ob peb zaug thaum lub sij hawm ziab ntawm qhov cub. Cov tshuaj hauv qab kuj tuaj yeem ua kom qhuav!
Hauv cov txheej txheem hnyav, siv txoj kev txo qhov hnyav, xyaum ntau dua, thiab sim txo tus lej rov qab raws li kev paub dhau los. Ntsuas qhov ntsuas qhov ua tau zoo tsawg kawg ntawm lub sijhawm, tsis pub ntau tshaj peb zaug ntawm feem ntau, thiab nws yog qhov zoo tshaj los ua nws ib zaug!
Ntsuas qhov zoo yuav tsum sim xyuas kom meej tias qhov ntim ntawm cov tshuaj noj yog 30-40 ml, thiab sim txo qhov ntim yuam kev!
Thaum lub sij hawm calibration txheej txheem, qhov ceev yuav tsum tau tswj kom zoo, thiab cov piv txwv thaum uas tig mus yuav tsum zoo ib yam li qhov ua tau!
