Noorganik kimyo” fanidan laboratoriya ishlanmasi Mavzu: Mis guruhchasi. Ishning maqsadi

Glyukoza eritmasini tayyorlash. 0,4 g glyukozani 8 ml suvda eriting va bir tomchi konsentrlangan nitrat kislota eritmasidan tomizib, eritmani 2 minut davomida qaynating. Eritmani sovitib teng hajmda spirt qo'shing.

Kumush qoplanadigan idishni yuvish. Probirkani issiq xromli aralashma «xrompik» bilan yuving, avval, vodoprovod suvida, keyin dislillangan suvda va spirtda yaxshilab chayqating.

Probirka devorini kumush bilan qoplash. Kumushning am­miakli eritmasini 10:1 nisbatda glyukoza eritmasi bilan aralashtiring. Tozalangan probirkaga reaksion aralashmadan 4— 5 ml quying va probirkani iliq suvli (50—60°C) stakanga tu­shiring. Nima kuzatiladi? Reaksiya tenglamasini yozing. Probirka devoriga o'tirgan kumushni qanday tozalash mumkin?