1-Nazorat ishi

To’ldiruvchi savollar


------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------To’ldiruvchi so’rov bali ________


III variant
Tajriba: 40g 5% natriy gidroksid eritmasini tayyorlash.
Bunday eritmani tayyorlash uchun kerak bo’ladigan ishqor va suvning massasini hisoblab toping.So’ngra texnik tarozida ishqorni o’lchab olib quying, so’ngra shisha tayoqcha yordamida yaxshilab aralashtiring. Hosil qiligan eritmangizni o’qituvchi bergan idishga quyib, eritmaning nomini va konsentratsiyasini yozib qo’ying. Xulosa_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Nazorat ishining bali _________