À 10.00 ml sample with an unknown concentration of RNU, Was additional 2.4 g of KNO, were added to reach saturation. What was initial concentration of KNO, in M.
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- The Handbook of Chemistry and Physics (http://openstaxcollege.org/l/16Handbook) gives solubilities of the following compounds in grams per 100 mL of water. Because these compounds are only slightly soluble, assume that the volume does not change on dissolution and calculate the solubility product for each. (a) BaSeO4, 0.0118 g/100 mL. (b) Ba(BrO3)2H2O, 0.30 g/100 mL. (c) NH4MgAsO46H2O, 0.033 g/100 mL. (d) La2(MoO4)3, 0.00179 g/100 mL9. An aqueous solution of sulfuric acid is prepared by mixing a secondary standard of sulfuric acid with deionized water. The aforementioned acid is to be used as a titrant hence its concentration must be accurately determined. To do this, Engr. Polinar, standardized the titrant by titrating two liters of ammonia at 0.90 atm and 30 deg C. From the experiment, 134 mL of the titrant was necessary to neutralize the ammonia. Determine the concentration of the acid in terms of normality? 10. Engr. Forcadela is optimizing a plastic formulation by manipulating the phosgene concentration injected as a gas during the reaction. To obtain credible results, he considered the propensity of phosgene to dissociate into carbon monoxide and chlorine gas at 395 deg C. Performing an experiment at the aforementioned temperature, an equilibrium is reached amongst the species where the total pressure is at 3 atm. If the equilibrium constant expression in terms of concentration for the reaction at 395 deg C…2) 3) Using equilibrium table, calculate the molar solubility of PbF2 [Ksp - 4x10"] in 0.035 M NaF aq. solution. mL. Using equilibrium table, calculate the Ksp of CaCO3 at this temperature. [Molar The solubility of CaCO3 in water at a certain temperature is 3.5x102 g/50 mass of CaCO3 is 100 g/mol] 4) Calculate the moles of acetic acid CH3COOH that should be added to 2.5 L of 0.35 M sodium acetatc CH3COONa aq. solution to prepare a buffer solution with pH of 4.8. [Ka acetic acid = 1.8x10-]
- 5:23 O13%DE elearning.yu.edu.jo/m O A student was given 2 beakers labeled with numbers 1 and 2, each beaker contains a clear solution. Additionally, he was given two reagent bottles labeled with A and B. Now, he added reagent A to both beakers and he noticed the formation of a precipitate in beaker 2 but not in beaker 1. However, the addition of reagent B to both beakers resulted in the formation of a precipitate in beaker 1 but not in beaker 2. Based on the information, which of the following is correct? a. compound A is the limiting reactant in beaker 1. b. compound B is the limiting reactant in beaker 2. c. compound A is the limiting reactant in beaker 2. d. compound B will be the excess reactant in beaker 1. Question 2Jhemerlyn was tasked to determine the solubility classification of an organic compound. She found out that it does not contain any N or S atoms and it is insoluble in both 5% HCl and concentrated H2SO4. Which of the following is the possible identity of the compound? а. H2C CI Ob. CI CI С. H3C CH3 CH3 d. H3C CH3What mass of lead (II) chloride, PbCl2, (K = 1.70 x 10-5, M.M. = %3D 278.1 g/mol), will dissolve in 275 mL of 0.659 M Pb(N03)2?
- A solution is prepared in which [Pb2+]= 0.0150 M and [Br 0.00350 M. Given that PbBr2 has a Kgo = 2.1 x 106, which of the following is true? %3D Select one: O a. Qsp Kg. and the solution is supersaturated %3D O d. Q.,< Kgp and the solution is supersaturatedA saturated silver carbonate solution (1.0 L) is preparedat 5 °C and filtered to separate the undissolved phase. The filtrate is treated at 25 °C withhydrochloric acid, whereby the carbonate ions decompose and carbon dioxide is formed. The measurement shows thatthe level of carbon dioxide above the reaction vessel is 600 ppm. All carbon dioxide gas formed is collected ina test tube with a volume of 19 mL, and at 25 °C the pressure is measured to be 114 mmHg. CalculateKsp for silver carbonate at 5 °C.What is the solubility of Pb3(PO4)2 if it's Ksp is 3.000e-44?
- 136 mL of 0.00015 M Pb(NO3)2 and 234 mL of 0.00028 M Na2SO4 (volumes are additive). Will a percipitate form? Hint: each solution dilutes the other upon mixing.(a) If the molar solubility of Tl2S at 25 oC is 5.31e-08 mol/L, what is the Ksp at this temperature?Ksp = (b) It is found that 1.75e-06 g of Cu3(AsO4)2 dissolves per 100 mL of aqueous solution at 25 oC. Calculate the solubility-product constant for Cu3(AsO4)2.Ksp = (c) The Ksp of BaCO3 at 25 oC is 2.58e-09. What is the molar solubility of BaCO3? solubility = ____ mol/LDetermination of the Solubility-Product Constant o Use your experimentally determined value of Ksp and show, by calculation, that Ag₂ CrO4 should precipitate when 5 mL of 0.0040 M AgNO3 are added to 5 mL of 0.0024 MK₂CrO4.