Shofirkon tuman 1- umumiy o’rta ta’lim maktabining – “ ” sinf o`quvchisi

Sana: _______________________
6-Nazorat ishi
Mavzu. Kalsiy va magniy. Suvning qattiqligi va uni yumshatish usullari. Aluminiy.
Nazorat shakli:Masala yechish.
I-variant.
1. Massasi 516gr bo’lgan tabiiy gips kuydirilganda hosil bo’lgan alebastrning massasini hisoblang.
2.10gr CaCO₃ dan necha gr Ca(HCO₃)₂ olinadi?
3.Mg(HCO₃)₂+Ca(OH)₂=…………reaksiyani davon ettiring.
Kompetentlikni aniqlash uchun materiallar:
4.Kundalik hayotimizda eng ko’p uchratadigan alyuminiyning qanday birikmalarini bilib oldingiz?
5.Ayollarimiz kir yuvish jarayonida qanday qilib qattiq suvni yumshatish usullaridan foydalanadilar?
II-variant.
1. 1,84gr dalomitni eritish uchun 10%li HCl eritmasidan necha gr kerak?
2.30gr MaSO₄ dan necha gr Mg₃(PO₄)₂olish mumkin?
3.CaSO₄ +Na₂CO₃=………….reaksiyani davom ettiring.
Kompetentlikni aniqlash uchun materiallar:
4.Kundalik turmushimizdaalyuminiydan qanday maqsadda foydalanilishini yozib bering.
5.Gipsdan qanday maqsadlarda foydalanamiz?

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