4-masala. Quyidagi o‘zgarishlarni amalga oshirish uchun zarur bo‘lgan
tajri balarni ba jaring:
C uO CuCl2 Cu(OH)2 CuO.
Zarur reaksiya tenglamalarini yozing.
1.______________________________________________________2______________________________________________________3_____________________________________________________________________________________________________________ 5-masala. Sizga ikkita probirkada soda, kaustik soda eritmalari berilgan. Tegishli reaksiyalar yordamida har bir moddani aniqlang. Reaksiyatenglamalarini yozing.
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