كيمياء 110 الترم الثاني 2012

[Hoshi]

كيف ينحل هذا السؤال ؟ وهل في مثله من امثلة الكتاب

What mass of K2CO3 is needed to prepare 200mL of a solution having a potassium ion concentration of 0.150 M?
a) 4.15 g
b) 10.4 g
c) 13.8 g
d) 2.07 g

وهذا السؤال :

What total gas volume (in liters) at 520

oC and 880 torr would result from the decomposition of 33 g of potassium
bicarbonate according to the equation:
2KHCO3(s) K2CO3(s) + CO2(g) + H2O(g)

(d) 19 L