Ag ++ NH 3 leftharpoons[ Ag ( NH 3)]+ ; k1=6.8 × 10-3 [ Ag ( NH 3)]++ NH 3 leftharpoons[ Ag ( NH 3)2]+ ; k2=1.6 × 10-3 then the formation constant of the complex [ Ag ( NH 3)2]+is

Question

Ag ++ NH 3 leftharpoons[ Ag ( NH 3)]+ ; k1=6.8 × 10-3 [ Ag ( NH 3)]++ NH 3 leftharpoons[ Ag ( NH 3)2]+ ; k2=1.6 × 10-3 then the formation constant of the complex [ Ag ( NH 3)2]+is (A) 1.08 × 10-7 (B) 1.08 × 10-5 (C) 1.08 × 10-9 (D) none of thee

Tardigrade Admin · Accepted Answer

K = k1 × k2 = (6.8 × 10-3)× (1.6 × 10-3) = 1.08 × 10-5

Q. $A g^{+} + N H_{3} ⇌ [A g (N H_{3})]^{+}; k_{1} = 6.8 \times 1 0^{- 3}$
$[A g (N H_{3})]^{+} + N H_{3} ⇌ [A g (N H_{3})_{2}]^{+}; k_{2} = 1.6 \times 1 0^{- 3}$
then the formation constant of the complex $[A g (N H_{3})_{2}]^{+}$ is

$1.08 \times 1 0^{- 7}$

$1.08 \times 1 0^{- 5}$

$1.08 \times 1 0^{- 9}$

none of thee

$K = k_{1} \times k_{2}$
$= (6.8 \times 1 0^{- 3}) \times (1.6 \times 1 0^{- 3}) = 1.08 \times 1 0^{- 5}$

Q. Ag++NH3​⇌[Ag(NH3​)]+;k1​=6.8×10−3 [Ag(NH3​)]++NH3​⇌[Ag(NH3​)2​]+;k2​=1.6×10−3 then the formation constant of the complex [Ag(NH3​)2​]+is

1.08×10−7

1.08×10−5

1.08×10−9