0620/12 Chemistry Oct Nov 2012 Online Test | Cambridge IGCSE MCQ
CIE
IGCSE
Chemistry (0620)
بهمن
2012
مشاهده نمونه سوال
شامل مباحث:
تعداد سوالات: 40
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
45 دقیقه

پیش نمایش صفحه اول فایل
Copper(II) sulfate crystals are blue. They are made by adding an excess of copper(II) oxide to sulfuric acid.
The mixture is heated and stirred.
The mixture is then filtered and the filtrate is allowed to evaporate, leaving blue crystals.
Why is filtration necessary?