Lead azide, Pb3(N3)3 has been used as a detonator in automobile airbags. A saturated solution of lead (IV) azide contains 25 mg in 100.0 mL What is Ksp?

1. (a) Lead azide, Pb₃(N₃)₃ has been used as a detonator in automobile airbags. A saturated solution of lead (IV) azide contains 25 mg in 100.0 mL What is K_sp?

Moles of Pb(N3)4 =

folarity of Pb(N3)4 =

mass

molar mass

0.025 g

375.2804 g / mol

= 6.66 ×10-5 mol

moles

volume (in L)

6.66 × 10-5 mol

1 L

1000 mL

= 6.66 ×10-4 M

100 mLx

The expression for the solubility product constant, Ksp iS

Ksp = [Pb4+][N3-]

= (s)(4s)4

= 256s5

= 256(6.66×10-4)5

= 3.3586×10-14

=3.4×10-14

• How many grams of lead azide will dissolve in 500 mL of 100 M Pb(NO3)2 solution?