Part A Given the two reactions l.H2S(aq-HS-(aq) + H+ (aq), K1-9.31x10-8, and -19

Question

Part A Given the two reactions l.H2S(aq-HS-(aq) + H+ (aq), K1-9.31x10-8, and -19 what is the equilibrium constant Kfinal for the following reaction? S2(a)2H (a)H2S(aq) Enter your answer numerically. Hints Knal 6.8 1025 final Submit My Answers Give Up Incorrect; Try Again; 3 attempts remaining Part B Given the two reactions 3. PbC12(s-PbH(aq) +2C1-(aq), K3= 1.88×10-10, and 4, AgCl(s)-Ag+ (aq) + Cl"(aq), K4=1.28x10-4 what is the equilibrium constant Kfinal for the following reaction? PhCl2(s) + 2Ag" (aq) 2AgCl(s) + Pb2+ (aq) Express your answer numerically. Hints final Submit My Answers Give Up Continue

Explanation / Answer

A)
3rd reaction = -1*reaction 1 -1*reaction 2
3rd reaction = -1(reaction 1 + reaction 2)
so, Kc3 = 1/(Kc1*Kc2)
= 1/(9.31*10^-8 * 1.18*10^-19)
= 9.10*10^25
Answer: 9.10*10^25

B)
3rd reaction = reaction 1 -2*reaction 2
so, Kc3 = Kc1/Kc2^2
= (1.88*10^-10)/(1.28*10^-4)^2
= 1.15*10^-2
Answer: 1.15*10^-2

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