The following data was collected for n-pentane and isopentane: Compound P, (kPa) n-pentane 282.9 at 70°C 895.5 at 120°C Isopentane 955.9 at 115°C 1152.4 at 125°C а) Develop a correlation for the vapor pressure of Isopentane as a function of temperature. Clearly state the units. b) Calculate the vapor pressure of Isopentane at 120°C. c) Estimate the heat of vaporization of Isopentane by using the data in the table.
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- The vapor pressure of component C is 272 torr, and that of component E is 176 torr at 35°C. The C-E solution at 35C with x=0.200 has a vapor pressure of 904.2 torr and vapor composition of x=0.272. 1. Calculate y, for C 2.15 and for E 4.99 : in this solution. 2. Calculate a, for C 2.42 and for E 2.678 in this solution. 3. Calculate p,-p, for component C 2264.38 : (J/mol) and E 857.32 : (J/mol). 4. Calculate AmyG= -1092.22 : (J) for the corresponding ideal solution.The main constituents in vinegar are water and ethanoic acid (CH3COOH). In order to determine the concentration of acid in homemade vinegar, a student titrated 25 cm3 of 001 M NaOH against the vinegar. The equation for the reaction is: CH3COOH(aq) + NaOH(aq) ® CH3COONa(aq) + H2O(l) The following titration results were obtained: Burette readings (cm3) Rough 1 2 Final burette reading 20.10 38.90 31.40 Initial burette reading 0.10 20.00 12.50 Volume of vinegar used 20.00 18.90 18.90 (a) What volume of vinegar should be used in the calculation? (b) What is the mole ratio of NaOH:CH3COOH? (c) Calculate the number of moles of alkali in 25 cm3 of NaOH solution used. (d) How many moles of acid were used in the titration? (e) Calculate the…An acidified and reduced iron sample required 40.2 ml of 0.0206 M KMN04. Find mg Fe (at wt = 55.8) and mg Fe203 (FW = 159.7 mg/mmol).
- An unknown mixture is known to contain only Ba(OH)2 (MW=171.34 g/mole) and NaOH (MW=40.0 g/mole). If the mixture is known to contain 45% by mass NaOH, and 8.0 grams of the mixture is dissolved completely in 50.0 ml of solution, answer the following. c).If 10.0 ml of a 0.2 M solution of Na2SO4 was added to the 50.0 ml solution, what would be the final concentration of Na+ in solution.A stock solution of drug Y is available at 10%w/v. You need to dilute this with Syrup, BP in order to supply a patient with a solution containing 5mg/mL of drug Y. Assuming no volume displacement effects, what is your formula for the preparation of 100 mL of the final solution?6 x 10⁻⁵¹ = (0.15 M)² [S²⁻] [S²⁻] = (6 x 10⁻⁵¹) / (0.15 M)² Calculating, we find the minimum concentration of sulfide ion required: [S²⁻] ≈ 2.7 x 10⁻⁴⁹ M. check it calcution is write
- Quinine ( C20 H24 N2 O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug. For quinine, pK, = 5.1 and pK, = 9.7 ( pKp = – log Kp). Only 1 g quinine will dissolve in 1920.0 mL of solution. Calculate the pH of a saturated aqueous solution of quinine. Consider only the reaction | Q+ H2O= QH+ + OH- described by pK, where Q = quinine. pH =The density of trifluoroacetic acid vapor was determined at 118.1 °C and 468.5 torr, and found to be 2.784 g/L. Calculate K, for the association of the acid. 0-H...O 2CF,CO,H(g) = CF;C CF,C(g) O----H-OThimerosal Tincture USP contains 0.1% w/v thimerosal and 50% v/v ethyl alcohol. If the cap is left off of a 15-mL bottle of the tincture, and the ethyl alcohol evaporates leaving a final volume of 9.5 mL, what is the concentration of thimerosal in the evaporated solution expressed as a ratio strength?
- Assuming the molar extinction coefficient for para-nitrophenyl phosphate (PNP) is 55,290 mol "dm cm, calculate the concentration of the molecule that produced an absorbance of 0.770 OD units in a 1.5 cm cuvette. Show all working -1 3 -1How many milliliters of 0.0050 N KOH are required to neutralize 25 mL of 0.0050 N H2SO4? To neutralize 25 mL of 0.0050 M H2SO4?Determine the fluoride ion concentration for a saturated solution of magnesium fluoride. K sp = 7.4 x 10-11