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- Consider a saturated solution of benzoic acid in water. Dichloromethane (a non-polar solvent) was added to the aqueous mixture, and the resulting mixture was mixed. After a while, a formation of two layers was observed. Given the structure of benzoic acid. Which of the following statements is TRUE? H ... H. HO H. benzoic acid A Benzoic acid will remain in the aqueous layer. B Benzoic acid will react to form sodium benzoate. Benzoic acid will be more soluble in the dichloromethane layer. D Benzoic acid will crystallize in the aqueous layer.Pretend that you are conducting this experiment in the laboratory and answer the following questions. You are asked to weigh 2 g of lithium and add it to 1500 ml of distilled water +2 drops of indicator, knowing that the density of water is 1 at room temperature while conducting this experiment. After knowing the amount of LiOH, you need to dilute to prepare 0.025 M of LiOH in a 3000 ml(v) solution. Show your calculation and units.Knowing that the initial volume that you used was 1500 ml(v). Use this equation to calculate ( CLiOH x VLiOH) before dilution = (CLiOH x VLiOH) after dilutionThere is a solution containing two metal cations. The goal is to separate them by slowly and carefully adding a solution of an anion, until one mental cation precipitates as a compound with that anion, leaving the other metal cation still in solution. M+ is Ag+, M2+ is Ca2+, anion is SO4 2-, first Ksp is 1.2 x 10-5, second Ksp is 6.1 x 10-5, and the starting concentrations of M+ is 1.50 x 10-2 M and M2+ is 3.50 x 10-2M. Using these values, predict which metal will precipitate first and what concentration of anion the precipitation will begin.
- 1. A sample of pure sodium oxalate, Na2C2O4 , weighing 0.2856 g is dissolved in water, sulfuric acid is added, and the solution titrated at 70°C , requiring 45.12 mL of a KMNO4 solution. The end point is overrun and back-titration is carried out with 1.74 mL of a 0.1032 N solution of oxalic acid. Calculate the normality of the KMNO4 solution. Hint: A redox reaction is involed between oxalate and permanganate. Look at the changes in oxidation state by determining the balanced redox reaction: 5C20,2 + + 2MN2+ 2 Mn04 + 10H* → 10CO2 + 8H20You are asked to weigh 2 g of lithium and add it to 1500 ml of distilled water +2drops of indicator, knowing that the density of water is 1 at room temperaturewhile conducting this experiment. After calculating the amount of LiOH, you need to dilute to prepare 0.25 M of LiOH in a 3000 ml solution. Show your calculation and units.Knowing that the initial volume that you used was 1500 ml. Use this equation to calculate ( CLiOH x VLiOH) before dilution = (CLiOH x VLiOH) after dilutionChemistry If 110.0 mL of 0.0030 MNa2SO4(aq) is saturated with CaSO4, how many grams of CaSO4 would be present in the solution? [Hint: Does the usual simplifying assumption hold?] Express your answer using two significant figures. This answer not 0.07 0.084, 0.09
- Unknown salt calibration curve 10- The calibration curve was generated using known concentrations of five solutions of a newly discovered inorganic salt. The density value of each solution was determined and the curve with its equation is shown in the graph. A student is asked to analyze a solution of this salt with a density of 94 8- y = 0.81x+0.233 7- 5.50 g/mL. What is the concentration, in % (w/v), of the 6- 5- unknown salt solution? 4- 3- salt concentration = % (w/v) 2- 1- 4 567 89 10 Salt concentration %(w/v) 1+| Post a new auestion hulu tv MacBook Pro $ & 4 7 8. R Y U %3D F G J K .... Density (g/mL) ト * LOuestion 9 of 9 Unknown salt calibration curve 10- The calibration curve was generated using known concentrations of five solutions of a newly discovered inorganic salt. The density value of each solution was 9. determined and the curve with its equation is shown in the 8- y= 1.11x+ 0.203 graph. A student is asked to analyze a solution of this salt with a density of 2.00 g/mL. What is the concentration, in % 7- (w/v), of the unknown salt solution? 5- salt concentration = % (w/v) } TOOLS x10 i 2 3 4 5 67 8 9 10 Salt concentration %(w/v) 山T四 stv A A hulu MacBook Density (g/mL)What is going on in the hexane layer at the end of a Group I Anion experiment? On a qualitative Analysis for Anions experiment, to a sample, I had to add 3 M HNO3 until it was just acidic. Then, I had to add 3 drops of NaOCl solution then 1mL hexane. After shaking it well, if the solution was yellow, the anion was Br-. If the solution was brown or purple, it was a I- Anion. What is going on with the hexane layer? What does it have to do with the periodic table?
- 12. [0/0.25 Points] DETAILS PREVIOUS ANSWERS What volume of 0.242 M HCI is required to neutralize each of the following solutions? (a) 25.0 mL of 0.105 M potassium hydroxide, KOH 4.0 X mL (b) 50.0 mL of 0.00524 M ammonia, NH3 4.0 X mL (c) 20.0 mL of 0.232 M calcium hydroxide, Ca(OH)2 4.0 X mL (d) 15.0 mL of 0.0952 M sodium hydroxide, NaOH 4.0 mL Submit Answer Submit Assignment Save Assignm44.0 mL of 0.140 M Na2SO4 and 25.0 mL of 0.180 M KCl. Assume that the volumes are additive. Enter your answers, separated by commas, using three significant figures. VE ΑΣΦ MNa+, Mso, ²-, MK+, Mc = ? M1. CL was tasked to identify the white solid inorganic salt that Dr. Yang gave her. From her preliminary tests, the possible identities were narrowed down to the following: Zn(CN)₂ Ksp (30°C) = 7.30 x 1012 AgSCN Ksp (30°C) = 5.90 × 10 11 CL chose to investigate the solubility equilibrium of this salt and determine its identity. To a 100.0 mL distilled water at room temperature, CL added the unknown reagent until it no longer dissolves. After letting the mixture stand for 15 mins, she filtered and collected the filtrate in another beaker. From this, a 20.00 mL aliquot was drawn and was titrated with 10.20 mL of 5.00 x 10 M HCI to reach the phenolphthalein endpoint. A. Let X be the titratable species from the dissolved salt. Determine the concentration of X from the titration data. B. Based on the results of CL's experiment and the provided constants, what is the likely identity of the unknown salt? Show complete solutions to support your answer. When she submitted her report to Dr.…