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Kuyesa kwa Calcium Formate
1. Chidule cha Njira
Mu yankho la calcium formate lofooka la alkaline, yankho lochulukirapo la potassium permanganate limawonjezedwa. Pambuyo potenthetsa kuti zitsimikizike kuti potassium permanganate yotsalayo imatulutsa ayodini kuchokera ku potassium iodide mu acid medium. Ayodini womasulidwayo amathiridwa ndi yankho la sodium thiosulfate standard.
2. Njira Yoyesera
Kukonzekera Chitsanzo:
Yesani pafupifupi 0.4 g ya chitsanzo (cholondola mpaka 0.0002 g) ndikuchisungunula mu botolo la 250 mL.
Sakanizani ndi madzi mpaka chizindikirocho ndipo sakanizani bwino.
Kuyankha kwa Oxidation:
Thirani 25.00 mL (kapena 10 mL) ya yankho mu botolo la ayodini.
Onjezani 0.2 g ya sodium carbonate yopanda madzi ndikusakaniza.
Onjezani bwino 50.00 mL (kapena 20 mL) ya yankho la potassium permanganate.
Tenthetsani mu bafa la madzi kwa mphindi 30, kenako muziziziritse.
Kumasulidwa kwa ayodini ndi kugawa kwa ayodini:
Onjezani 6 mL ya sulfuric acid solution ndi 2 g ya potassium iodide.
Sungani mumdima kwa mphindi 5.
Thirani ndi yankho la sodium thiosulfate standard.
Pafupi ndi mapeto, onjezerani 3 mL ya starch indicator (0.5%).
Pitirizani kuyika mpaka mtundu wabuluu utasowa.
Mayeso Opanda Kanthu:
Chitani mayeso opanda kanthu pansi pa mikhalidwe yomweyi kuti mukonze.