Osh tuzi eritmasini tayyorlash. 1. Massa ulushi 0,06 bo‘lgan osh tuzining eritmasidan 50 g tayyorlash
uchun zarur bo‘lgan osh tuzi va suvning massalari hisoblab topiladi. (Izoh: Laboratoriya imkoniyatlaridan foydalanib, turli moddalarning har xil konsentra tsiyalardagi eritmalarini tayyorlash mumkin).
2. Hisoblab topilgan tuz miqdori tarozida, suv esa o‘lchov probirkasi
yordamida o‘lchab olinadi (37-rasm). (Izoh: Tarozida tortish qoidalari va
suyuqliklarni o‘lchash qoidalarini eslang).
3. Tortib olingan tuzni kolbaga solib, ustiga o‘lchangan suv quyiladi va
bir jinsli eritma hosil bo‘lguncha aralashtiriladi.
4. Tayyorlangan eritma idishga quyiladi. Idishga tuzning formulasi,
eritmaning konsentratsiyasi va tayyorlangan vaqti yozilgan yorliq
yopishtiriladi.
hisobot tayyorlanadi.
Xulosa_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________