11) The Ksp expression for copper (II) sulfate is: a. [Cu2+][SO4²¯] b. [Cu²+]² [SO4²]² c. [Cu²+]²[SO4²] d. [CuSO4] 12) Which of the following is true about a chemical system in equilibrium? a. All chemical reactions have stopped b. The concentration of reactants is equal to the concertation of products c. The forward and reverse reaction rates become equal d. The system will remain at equilibrium regardless of any external factors

Calculate the solubility of copper(II) iodate, Cu(IO3)2 (Ksp = 7.4 108), in (a) water. (b) a 0.10 M copper(II) nitrate solution.

Consider the equilibrium reaction below. [Cu(H₂O)6]²+ (aq) + 4 Cl (aq) light blue 1. A test tube in 2. the to [CuC14]²+ (aq) + 6 H₂O (1) orange COWNIC is color? 14 TOT Châtelie anges to for the color? pic. Dior species diesent 3. The test tube in 2, is put into an ice bath. The solution changes to a light blue color. What is the major species present in the solution responsible for the color? b. Explain the effect of heat in terms of Le Châtelier's principle.

1. Unexposed silver halides are removed from photographic film when they react with sodium thiosulfate (Na2S2O3), to form the complex ion Ag(S2O3)23- (Kf = 4.7 x 1013). What mass of Na2S2O3 is required to prepare 1.00 L of a solution that will dissolve 1.00 g of AgBr by the formation of Ag(S2O3)23-? Part 2: What is the molar solubility of CaF2 (Ksp = 4.0 x 10-11) in a 0.100-M solution of HF? Ka for HF = 7.2 x 10–4.

In the complex ion [Fe(CN)6], the oxidation number of Fe is Select one: O A. +3. O B. -4. O C. +2. O D. +1. O E. +6. F4 FS FA F9 F10 F11 F12 PriSc %24 & R U G H K L V M Alt Ctri

What is the [NH4] in the solution?

The iron(III) ion reacts with thiocyanate ion (SCN 3. The iron(III) ion reacts with thiocyanate ion (SCN) to form a red complex ion with the formula [FeSCN]²+. The net ionic equation describing this reaction is: Fe³+ + (aq) It. yellow SCN (aq) colorless [FeSCN] (aq) red A student studying this reaction begins with an equilibrium mixture that is light pink. (1) What change will the student observe when a solution containing iron(III) ion is added to this mixture? (2) Briefly explain how your answer to (1) is consistent with LeChâtelier's principle. (3) Silver ion reacts with thiocyanate ion to form insoluble silver thiocyanate (AgSCN). How will the color of the solution change when AgNO3 (en) is added to the mixture after (1) is performed? (4) Briefly explain how your answer to (3) is consistent with LeChâtelier's principle.

In which of the following solutions will the Cu(OH)2 be most soluble? Note: Cu2+ forms a coordination complex, Cu(NH3)4+2 ions (i.e. product of Lewis base-Lewis acid reaction) in NH3(aq) while it forms Cu(OH)2 precipitate in basic solutions? A. 6.0 M Na2CO3 B. 6.0 M NH3 C. Cu(OH)2 will be very soluble in all of the above solutions  D. 1.0 M LiOH- E. H2O

1.Calculate the normality of the solutions containing 5.267g/L K2Cr2O7 (the Cr is reduced to Cr3+).(FW=294.19 g/mol) 2.A and B react as follows: A + B 2C. The equilibrium constant is 5.0 x 106. If 0.40 mol of Aand 0.70 mol of B are mixed in 1L, what are the concentrations of A, B and C after reaction? 3. The following data is given at a certain temperature:(1) 2N2 (g) + O2 (g) 2N2O (g) K1 = 1.2 x 10-35(2) N2O4 (g) 2NO2 (g) K2 = 4.6 x 10-3(3) ½N2 (g) + O2 (g) NO2 (g) K3 = 4.1 x 10-9Calculate the molar equilibrium constant, K for the reaction:2N2O (g) + 3O2 (g) 2N2O4 (g)

9. [CoCl4]? (suda) + 6H2O (s) [Co(H2O)6]?* (suda) + 4Cl (suda) + isi blue ping The reaction given above is in equilibrium at constant temperature and the following steps are applied. Balance Answer the following questions taking into account the reaction. a) When distilled water is added to the balance, in which direction does the balance move and what will be the resulting color? b) When a salt containing chloride ions is added to the equilibrium, in which direction does the equilibrium move and what color will be formed? c) When the reaction at equilibrium is heated, in which direction does the equilibrium move and what color will be formed?