Samarqand viloyati payariq tumani maktabning sinf o’quvchisi

Sana_______________
Nazorat ishi-5
1. Xlorni labaratoriyada va sanoatda olinish usullarini yozing.
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2. 32 gr brom olish uchun KBr eritmasi orqali necha litr (n.sh.da) xlor gazini o’tkazish kerak?
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3. 30 % li xlorid kislota eritmasini tayyorlash uchun 100 gr suvda necha litr(n.sh.da) HCl gazini eritish kerak?
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4. 55,5 g karnallit tarkibida necha dona atom bor?
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5. Mn₂O_7, Al(OH)₃, H₃PO_4, K₂SO_4, Fe₂(SO₄)₃ ushbu moddalarni ekvivalent massalarini toping?
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Baho________