Paper 1 May/June 2017 CHEMISTRY (9701/12) IGCSE
Cambridge
AS & A Level
Chemistry (9701)
شهریور
2017
شامل مباحث:
تعداد سوالات: 45
سطح دشواری:
متوسط
شروع:
آزاد
پایان:
آزاد
مدت پاسخگویی:
60 دقیقه
پیش نمایش صفحه اول فایل
Danial Naderi
ثبت شده در
2 بهمن 1401
Oxygen can be prepared by the reaction of potassium manganate(VII), KMnO$_4$, hydrogen peroxide, H$_2$O$_2$, and sulfuric acid, H$_2$SO$_4$. Each H$_2$O$_2$ molecule loses two electrons in this reaction. The other products of the reaction are potassium sulfate, manganese(II) sulfate and water.
How many moles of oxygen gas are produced when 1.0 mol of KMnO$_4$ reacts with an excess of H$_2$O$_2$ in acidic conditions?
