Yuav ua li cas los ntsuam xyuas qhov ntxiv ntawm cov tshuaj inorganic hauv ACR cov khoom pab ua haujlwm?

Txoj kev nrhiav Ca2+:

Cov cuab yeej sim thiab cov tshuaj reagents: beakers; Lub raj mis conical; Lub raj mis funnel; Burette; Lub cub hluav taws xob; Anhydrous ethanol; Hydrochloric acid, NH3-NH4Cl buffer solution, calcium indicator, 0.02mol/LEDTA standard solution.

Cov kauj ruam sim:
1. Ntsuas qhov hnyav ntawm cov qauv pab ua ACR kom raug (qhov tseeb txog 0.0001g) thiab muab tso rau hauv lub beaker. Ua kom nws ntub nrog anhydrous ethanol, tom qab ntawd ntxiv ntau dhau ntawm 1: 1 hydrochloric acid thiab cua sov rau ntawm lub cub hluav taws xob kom cov calcium ions cuam tshuam nrog hydrochloric acid;
2. Ntxuav nrog dej thiab lim nrog lub funnel kom tau nws cov kua ntshiab;
3. Kho qhov pH kom ntau dua 12 siv cov tshuaj NH3-NH4Cl buffer, ntxiv cov calcium indicator kom tsim nyog, thiab titrate nrog 0.02mol/LEDTA tus qauv tshuaj. Lub ntsiab lus kawg yog thaum xim hloov ntawm xim liab mus rau xiav ntshiab;
4. Ua ib qho kev xeem dawb paug tib lub sijhawm;
5. Xam C # a2+=0.02 $(V-V0) $0.04004M $%&&
V - Qhov ntim ntawm EDTA kua siv thaum kuaj ACR cov qauv pab ua (mL).
V # - Qhov ntim ntawm cov tshuaj siv thaum lub sijhawm sim dawb paug
M — Ntsuas qhov hnyav ntawm cov qauv pab ua ACR (g).

Txoj kev hlawv rau kev ntsuas cov khoom inorganic:
Cov cuab yeej sim: kev sib npaug analytical, lub cub tawg muffle.
Cov kauj ruam sim: Siv cov qauv ACR ua cov khoom pab ua 0.5,1.0g (raug rau 0.001g), muab tso rau hauv lub cub tawg uas kub tas li 950 degrees thiab hlawv rau 1 teev, tom qab ntawd txias thiab hnyav kom xam cov khoom hlawv seem. Yog tias cov khoom inorganic ntxiv rau hauv cov qauv ntawm cov khoom pab ua ACR, yuav muaj ntau cov seem.
Txoj kev siv tshuaj yaj:
1. Cov cuab yeej sim thiab cov tshuaj reagent ntsuas qhov sib npaug; 25mL lub raj mis volumetric; Trichloromethane.
Kauj Ruam 2: Raws li txoj kev kuaj ACR intrinsic viscosity, hnyav 75mg ntawm cov qauv thiab muab tso rau hauv lub raj mis volumetric 25mL. Ntxiv cov tshuaj trichloromethane. Yog tias muaj qhov turbidity lossis lub teeb pom kev zoo.