Can you please answer these chem questions?
PbCl2(s) <--> Pb2+(aq) + 2Cl1-(aq) K = 1.7e-5
2) HF is a weak acid that reacts with water according to the following equation:
HF(aq) + H2O(l) <--> H3O1+(aq) + F1-(aq) K = 7.20e-04
-What is the equilibrium concentration of hydronium ion in a solution that is 0.0522 M in HF and 0.128 M in F1- ion?
Answer:
1) Ksp = 1.7 x 10^-5 = x ( 0.047 + 2x)^2 = 0.00769 M
2 ) 7.20 x 10^-4 = x ( x + 0.128 ) / 0.0522 - x
Solve by quadratic formula and you get x = [H3O+]
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