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- What would (triangle) Hrxn be for this new situation with 40 ml of both 1.0 M NaOH and 1.0 M HCl, Ccal=166.8, Tempertre final was 28.9 C, the initial temperature was 22.1 C.A chemist is asked to separate the components of a mixture composed of 1.00 g each of the two compounds shown below. The chemist has access to the following bases: 10% aqueous NaHCO3 and 10% aqueous NaOH. Which base and how many mLs of the base (i.e., the minimum amount) are needed to completely separate these compounds from each other by liquid-liquid extraction?4. What volume of dilute nitric acid of density 1.11g/mL and 19% nitric acid by weight contains in 10g nitric acid. 5. Given 200cm3 of pure water at 40C, what volume of a solution of hydrochloric acid whose density is 1.175g/cm3 and containing 344.4% HCl by weight, could be prepared?6. How many grams of Na2CO3 are needed to prepare 500cm3 of a solution containing 10.0mg of CO32- per cm3?7. What volume of 0.300M H2SO4 is required to exactly neutralize 200mL of 0.500M NaOH?2NaOH + H2SO4 Na2SO4 + 2H2O
- Which of the following methods of preparing 0.0010M HCl solution from 1.0M stock HCl Solution willyield the smaller overlall uncertainty? a. A one step Dilution that uses 1mL(±0.006) pipet and 1000mL(±0.30) Volumetric Flask, or b. A two-step dilution that uses 20mL (±0.03) pipet and a 1000mL(±0.30) volumetric flask and a25 mL (±0.03) pipet and a 500mL(±0.20) volumetric flask for second dilution.What would (triangle) Hrxn be for this new situation with 40 ml of both 1.0 M NaOH and 1.0 M HCl, Ccal=166.8? The final temperature was 28.9 C, the initial temperature was 22.1 C.Example: Calculation the weight of barium iodate Ba(IO3)2 if it dissolved in 500mL of distilled water (D.W) at 25 °C if M.wt of ppt = 487 g/mole and %3D Ksp= 1.57x10.
- 0.25M HCl (500 mL) will be prepared from 37.2%(w/w) with density 1.19 g/mLConvert 370 ppm of CO2 to μg/m3 at 20oC and 101.325 kPa. Convert 80 μg/m3 of SO2 to ppm at 25oC and 101.325 kPa.The partial molar volumes of acetone and chloroform, in a solution in which the molar fraction of chloroform is 0.4693, are 74.166 cm3mol-1 and 80.235 cm3 mol-1, respectively. What is the volume of 1,000 kg of this solution? Data: M.M. (acetone) = 58.08 gmol-1; M.M. (chloroform) = 119.07 gmol-1.
- Chloroform (1)/methyl ethyl ketone (2) form a solution in vapor liquid equilibrium at 330 K 1) The chloroform concentration in the liquid phase is x1 = 0.55. Assuming an ideal gas and an ideal solutionof liquids, what are y1 and P (in kPa), to 3 significant figures? 2) Was the “ideal solution of liquids” an accurate assumption in part (a.)? Clearly state Yes/No and explain 1-2 sentencesQ. No. 5 Write functions and procedure of analysis of various volatile organic molecules by using Gas chromatographyWater and 1-butanol are only partially miscible, so that when the two liquids are mixed, separate phases are formed. A mixture is prepared, in which the volumes of the aqueous and organic phases are equal. Ethanoic acid is then added to the mixture. The concentration in the aqueous phase is 0.094 mol dm-3 and in the organic phase 0.014 mol dm-3 . Additional solvent is then added such that the volume of the aqueous phase becomes double that of the organic phase. What are the new concentrations?