Mavzu: Dastlabki kimyoviy tushuncha va qonunlar. Kimyoviy formula, valentlik. Darsning maqsadi

Qo`shimcha foydalanish uchun masalaalar

1. Kalsiy nitratning 10 ^oC dagi eruvchanlik koeffitsienti 114,6 g bo‘lsa, shu haroratda to‘yingan eritmadagi Ca(NO₃)₂ ning massa ulushini toping.

2. Kaliy atsetatning 10 ^oC dagi eruvchanlik koeffitsienti 233,9 g bo‘lsa, shu eritmadagi CH₃COOK ning massa ulushini toping.

3. Cd(NO₃)₂·4H₂O ning 0 ^oC dagi eruvchanlik koeffitsienti 135,3 g bo‘lsa, uning shu haroratda to‘yingan eritmasidagi Cd(NO₃)₂ ning massa ulushini toping

4. Magniy nitrat kristallgidratining – Mg(NO₃)₂·6H₂O 20 ^oC dagi eruvchanlik koeffitsienti 73,3 g bo‘lsa, uning shu haroratda to‘yingan eritmasidagi Mg(NO₃)₂ ning massa ulushini toping.

5. Suvda 8,0 g NaOH eritilib, eritmaning hajmi 1000 ml ga etkazilgan bo‘lsa,

eritmaning molyar konsentratsiyasi qanday bo‘ladi?

6. 26,4 g massali ammoniy sulfatni 61,6 g massali suvda eritganda 1,172 g/ml zichlikli eritma hosil bo‘lgan, shu eritmaning molyar konsentratsiyasini toping.