82- rasm. Uglerod (IV) oksidni olish uchin
asbob
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Xulosa._____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________4-tajriba. Ba’zi karbonat tuzlarining gidrolizi a) kaliy karbonat va gidrokarbonatining gidrolizi. Ikkita probirka olib, birinchisiga kaliy karbonat eritmasidan, ikkinchisiga kaliy gidrokarbonat eritmasidan 4-5 tomchi soling.
Har ikki probirkadagi eritmaga neytral lakmus eritmasidan birikki tomchi yoki qizil lakmus qog‘ozi bilan ta’sir etib, lakmus rangining o‘zgarishiga e’tibor bering. Qaysi eritmada gidroliz kuchsiz borishini aniqlab, gidroliz tenglamalarini molekulyar va ionli shaklda yozing;
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ b) ba’zi metall tuzlari gidroliziga karbonatlarning ta’siri. Ikkita probirka olib, birinchisiga 4-5 tomchi FeCl3 eritmasidan, ikkinchisiga Cr2 (SO 4 )3 eritmasidan 4-5 tomchi quying, lakmus qog‘ozlari bilan eritmalar muhitini aniqlang. Gidroliz tenglamalarini molekulyar va ionli shaklda yozing. Har bir probirkaga 5-6 tomchidan soda (Na 2CO3) eritmasidan qo‘shing. O‘zgarishlarni kuzating. Qanday gaz ajralib chiqadi? Har bir probirkada qanday cho‘kmalarni ko‘rasiz? Nima uchun har ikki probirkada ham to‘la gidroliz ketadi? Reaksiya tenglamalarini molekulyar va ionli shaklda yozing.
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Xulosa._______________________________________________________________________________________________________________________________________________________________________________________________________________5-tajriba. Karbonatlarga kislotalar ta’siri Alohida probirkalarga ozroq MgCO3 va BaCO3 tuzlaridan solib, ustiga suyultirilgan xlorid kislotadan qo‘shing. Tuzlarning
erishini va gaz ajralib chiqishini kuzating. Chiqayotgan gaz uglerod (IV) oksid ekanligini isbotlang. Reaksiya tenglamalarini yozing.
_____________________________________________________________________________________________________________________________________________________________________________________________________________________Xulosa._______________________________________________________________________________________________________________________________________________________________________________________________________________6-tajriba. Karbonatlarning termik parchalanishi.
81-rasmda ko‘rsatilganidek asbob yig‘ing. 1-probirkaga mis gidroksikarbonatdan ozroq solib, rasmda ko‘rsatilganidek gaz chiqarish nayini ohakli suv solingan 2-probirkaga tushiring. Tuzli probirkani ohista qizdiring. Mis gidroksokarbonat rangining o‘zgarishini va ohakli suvning loyqalanishini kuzating. Reaksiyadan so‘ng probirkada qora mis (II) oksid qoladi. Reaksiya tenglamasini yozing. Shu tajribani NaHCO3, Na 2CO3 va MgCO3 bilan qaytarib, bu tuzlarning qaysi biri termik parchalanishga chidamli ekanligi
haqida xulosa qiling.
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Xulosa._______________________________________________________________________________________________________________________________________________________________________________________________________________ 29- lab.mashg’uloti. Kremniy, uning birikmalari va xossalari.
