Question

Pre-lab Questions for Experiment #11 1) Will a precipitate form when 0.150 L of 0.10 M PHNO The K, for Polis 1.2 x 10-)(Show your calculatio) . 100 L 0,30 M N e w Lof 1 2) Calculate whether a precipitate will form if 2.00 mL of 60 M N aredided to (Show your calculations) -1.8 x 10 and K [FeOH) - 1610) INH! 10 0 4 (Given that N oir 3) Solid silver chromate is added to pure water at 25 °C, and some of the solid remains undiwed. The mixture is stirred for several days to ensure that equilibrium is achieved between the undissolved A CO) and the solution Analysis of the equilibrated solution shows that its silver ion concentration is 13 x 10 M. Assuming that A CO dissociates completely in water and that there are no other importantequilibria involving Ag' or CO2 ions in the solution, calculate for this compound. -1.8 x 10-) at 25 C in: 4) Calculate the molar solubility of AgCl(K (a) Pure water (b) 3.0 MNH [Hint: AgCl(s) + 2 NH() == Ag(NH3)2(Ap) + C (0) K3.1 X 10')

Answer 1

. Pb(NO3)2 Nach Nat P6+2 0,50L, oolm Qolli 0.2m After miscing todel volume = 0.15+0,1 - 025L Now from moui= M2 V2. CP6+2] = 0:15 X01 m = 0.06 m 0,25 [ce ] = 0.18 0.2 6 = - 0.08 m 0,25 res precipitate will form if (for Pocle) 1 [pbt2] [ ² >,ksp - asp=[Pbt?] ( cr]² = (0.06) (0.08) = 3-848164 epsp is groader than resp so precipitate will form,