Which reaction has a DeltaSdegree > 0? 2H2(g) + O2(g) rightarrow 2H2O(g) Ag^+(aq

Question

Which reaction has a DeltaSdegree > 0? 2H2(g) + O2(g) rightarrow 2H2O(g) Ag^+(aq) + Cl^-(aq) rightarrow AgCl(s) 2NH3(g) rightarrow 3H2(g) + N2(g) 2H2(g) + O2(g) rightarrow 2H2O(l) What is the correct equilibrium expression for this reaction? CaCO3(s) + 2HCl(aq) CaCl2(aq) + H2O(l) + CO2(aq) Kc = [CaCl2]/[HCl] Kc = [CaCl2][CO2]/[HCl]^2 Kc = [CaCl2][H2O][CO2]/[Hcl]^2 Kc = [CaCl2][H2O][CO2]/[CaCO3][HCl]^2 What is the molar solubility of TIBr in pure water at 25 degreeC? 1.38 times 10^-11 M 1.93 times 10^-6 M 1.93 times 10^-3 M 3.71 times 10^-3 M In which solution will AgCl be the least soluble? pure water 0.007 M AgNO3 0.02 M NH3 0.2 m HCl Which salt will produce a neutral solution when dissolved in water? NaBr NaCN NaF NaOCl At 95degreeC, Kw is approximately 1.0 times 10^-13. What is the pH of pure water at this temperature? 13.00 7.50 7.00 6.50 The titration of a week acid by adding a strong base. The titration of a strong base by adding a weak acid. The titration of a strong acid by adding a strong base. The titration of a strong base by adding a strong acid. What is [H2O^+] for a 0.0150 M NH3 solution? ks[NH3] = 1.8 times 10^-5 6.6 times 10^-13 M 1.9 times 10^-11 M 3.8 times 10^-8 M 5.2 times 10^-4 M Which pair of substances will form an aqueous buffer with pH > 7 when equimolar solutions are mixed? CH3CO2H/ cH3CO2Na HF/NaF NaOH/NaCl HOCl/ NaOCl What is the pH of a 0.35 M soliution of HCN? K [HCN] =4.9 times 10^-10 A mixture of gaseous nitrogen, hydrogen , and ammion is placed in a sealed container and bought to equilibrum. Which change to the system will result in an increase in the number of moles of nitrogen gas?

Explanation / Answer

53)

For S> to increasew, you must increase chaos and disorder

reaction C is the answer, since it will increase the mole of gases in the porudcts

54)

The EQ is only to those in aquous and gasous phases, solid and liquids ar enot considered since A = 1

The only valid answer s B

55)

TlBr --> Tl- + Br-

then ksp = (S)(S)

S = sqrt(3.71*10^-6) =0.001926 which is C

56)

AgCl is less soluble in a solution in which Cl- ions is rich in solution, that is in D with M = 0.2 M of Cl- ions

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