22) A solution containing AgNO3 is mised with a solution of NaCl to form a solut

Question

22) A solution containing AgNO3 is mised with a solution of NaCl to form a solution Shat is 0.10 M in AgNOj and 0075 M in NaCI Use Q to determine what will happen once these solutions are mixed? Kp(Agco-1.7 10-10 A) Nothing will happen since the molar solubility of Agct is igher than the solurion concentrations Nothing wil happen since NeCI and AgNoj are both solutble compounds C) Silver chloride will precipitate out of solution leaving an uncaturated solution of Agci D) Silver chloride will precipitate out of solution, leaving a saturated AgCI solution E) There is not enough information to say anything about this solution 23) Shown below is a concentration vs, time pict for the resaction A B.For this reaction the value of the equilitrium constant is 0.100 0 050 0040 0020 5.00 A) Kcc1 C) Kc 1. D) K>1 24) Determine the equilibrium constant for the following reaction a1298 K. A) 0.98

Explanation / Answer

22. AgNO3 + NaCl --> AgCl (ppt) + NaNO3

Q = [Ag+][Cl-]

    = (0.1)(0.075) = 7.5 x 10^-3 M

Q > Ksp, so AgCl would precipitate

(C) silver chloride will precipitate out of solution leaving behind an unsaturated AgCl solution

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23. For the given reaction, equilibrium constant Kc

Kc = [B]/[A] = 0.05/0.07 = 0.714

So,

A) Kc < 1

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24. For the given reaction,

dG = -RTlnK

with,

dG = -34.5 kJ = -34500 J

R = gas constant

T = 298 k

K = equilibrium constant

we get,

-34500 = -8.314 x 298 lnK

K = 1.12 x 10^6

D) 1.12 x 10^6

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