In this case
k = x min−1 and [A0]
= 0.01M = 1 × 10−2M
t = 1 hour = 60 min
[A]= 1 × 10−2 ( e−60x)
T1 = 200K ; k = k1
T2 = 400K ; k = k2
= 2k1
CaF2 has
cubical close packed arrangement
Ca2+ ions are
in face centered cubic arrangement, each Ca2+ ions is surrounded by 8 F− ions and each F−
ion is surrounded by 4 Ca2+ ions.
Therefore coordination
number of Ca2+ is 8 and of F− is 4
In the complex [M (en)2 (Ox)]
Cl For the central metal ion M3+
The primary valance is = +3
The secondary valance = 6
sum of primary valance and secondary valance = 3+6 = 9