Mustaqillik yillarida mamlakatimizda hukumatimiz tomonidan ta’lim sohasiga eng muhim vazifa sifatida e’tibor qaratib kelinayotgani sir emas. Bu sohada qator islohotlar qabul qilindi

Nazorat ishining bali _________


II variant
1.Quyidagi kuchli elektrolitlarning elektrolitik dissotsiyalanish tenglamalarini yozing:
NaOH, Fe(NO₃)₃, HNO₃, Ba(OH)₂.
2.Formulalari quyida berilgan moddalardan qaysilari juft-juft bo‘lib reaksiyaga kirishib, HCI hosil qiladi? Reaksiya tenglamalarini yozing.
NaCI, KCI, NaHSO₄, H₂SO₄.
3.Kaliy xloridning massa ulushi 0,03 bo‘lgan 500 g eritmasi buglatilishi natijasida eritma massasi 300 g ga kamaydi. Qolgan eritmadagi kaliy xloridning massa ulushini toping.
4.30% li xlorid kislota bilan tegishli miqdordagi soda o‘zaro to'la ta’sirlashishi natijasida hosil bo'lgan eritmadagi tuzning konsentratsiyasini (%) hisoblang.
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