If you measured the boiling point of the solution used in Trial 4, would you predict it would have a boiling point equal to, higher than, or lower than the boiling point of pure cyclohexane? Explain your answer.
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If you measured the boiling point of the solution used in Trial 4, would you predict it would have
a boiling point equal to, higher than, or lower than the boiling point of pure cyclohexane?
Explain your answer.
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- 15 16 17 18 19 20 21 22 23 24 25 26 27 A certain liquid X has a normal freezing point of 4.80 °C and a freezing point depression constant K,=6.94 °C-kg-mol . Calculate the freezing point of a !! solution made of 175.g of iron(III) nitrate (Fe(NO,),) dissolved in 850. g of X. db Round your answer to 3 significant digits. Submit Assignment Continue MacBook Air F12 FII F9 F10 FB 000 F6 F7 80 F5 esc F1 F2 * & $ %Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 1.90 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 4.88 °C. Look up the freezing point and Kf constant for cyclohexane in the Colligative Constants table. Calculate the molar mass of quinine. molar mass: g/molThe experimental data in the table was collected during a freezing point depression study where BHT (butylated hydroxytoluene) was the solvent. Mass Mass of BHT of unknown 8.526 g 1.316 g Use this data to calculate the molar mass of the unknown solute. molar mass= 16962 Incorrect psy HW 3.pdf Freezing point of pure BHT 74.60 °C APA Title Page -....doc Freezing point of BHT and unknown solution 71.69 °C PSY Final Project....pdf A K₁ for BHT 6.83 °C/m g/mol SH
- In this problem you will model the mixing energy of a mixture in a relatively simple way, in order to relate the existence of a solubility gap to molecular behavior. Consider a mixture of A and B molecules that is ideal in every way but one: The potential energy due to the interaction of neighboring molecules depends upon whether the molecules are like or unlike. Let n be the average number of nearest neighbors of any given molecule (perhaps 6 or 8 or 10). Let Uo be the average potential energy associated with the interaction between neighboring molecules that are the same (A-A or B-B), and let UAB be the potential energy associated with the interaction of a neighboring unlike pair (A-B). There are no interactions beyond the range of the nearest neighbors; the values of Uo and UAB are independent of the amounts of A and B; and the entropy of mixing is the same as for an ideal solution. Find an expression for the maximum temperature at which this system has a solubility gap.Joint Package Course/28-11-2021 Paragraph for Questions 9 and TO স্ 9 एवं 10 के लिये अनुष्छेद At 298 K following observation was made for KCI solution Concentration (Mol/L) Am (S cm² mol) 0.01 0.04 123 112 298 K पर, KCI विलयन के लिए निम्न प्रेक्षण लिए गये सान्द्रता (MolL) Am (S cm² mol") 0.01 0.04 123 What is limiting molar conductance of KCI at 298 K (in S cm' mol) 112 298 K पर, KCI का सीमान्त मोलर चालकत्व (S cm' mol में) क्या है? (A) 134 (B) 145 (C) 150 (D) 166 10. Specific conductance of 0.25 M KCI solution at 298 K is (in S m) 298 K पर, 0.25 M KCI विलयन का विशिष्ट चालकत्व (S m में) हैं - (C) 0.01975 (D) 1.975 (A) 0.017 (B) 1.7 9.Study the tabulated data during an gravimetric analysis of BaSO4 experiment Trial T1 T2 T3 Mass of sample (g) 1.0040 1.0100 1.0050 Constant weight of empty crucible (g) 10.2453 10.2454 10.2454 Constant weight after ignition (g) 10.3253 10.3252 10.3253 1. Calculate the mean mass of precipitate as BaSO4 a. 0.0799 g b. 0.0800 c. 0.08 g 2. Calculate the mean weight of sulphate (MM BaSO4 = 233.39 g/mol, So42- = 176 g/mol)? a. 0.0603 g b. 0.06 g c. 0.06025 g 3. Calculate the mean % SO42- in the sample a. 6.00% b. 5.991% c. 5.9908%
- Q1. A suspension of colloidal particles in water (temperature 25°C and viscosity 8.9x104 Ns m2) shows a particle concentration of 10¹1 per cm³. Calculate the half time to diffusion controlled coagulation.e following relation describes the volume change in a water (solvent – species 1) and salt (solute – species 2) solution: V=1.001+16.625n2 +56.092 n23/2 +119.4n22 where V is expressed in units of liters, and n2 in kmole. (1) Obtain an expression for partial V2 in terms of n2, and determine partial V2 when x2 is approching 0 in liter per kmole. (2) Obtain an expression for partial V1 one in terms of n2, and one in terms of x1The homogeneity of the chloride level in a water sample from a lake was tested by analyzing por- tions drawn from the top and from near the bottom of the lake, with the following results in ppm CI: Top 26.30 Bottom 26.22 26.43 26.32 26.28 26.20 26.19 26.11 26.49 26.42 (a) Apply the i test at the 95% confidence level to determine if the means are different. (b) Now use the paired / test and determine whether there is a significant difference between the top and bottom values at the 95% confidence level. (c) Why is a different conclusion drawn from using the paired i test than from just pooling the data and using the normal i test for differences in means?
- Alt Alt Ctrl HRA chemist pRopaped 1 レ dissilving B.0g of Ag NO, in wateR matke 350.0mb to of Sólution. what is the molaizity Of the solution? molaR mass of silver hiticate =ll09.889mil %3DCalculate the vapor pressure of propanol (b.p. 97.0 ∘C97.0 ∘C) at the gas chromatography column temperature of 95.0 ∘C95.0 ∘C using the form of the Clausius–Clapeyron equation shown ln(?1?2)=−(Δ?vap?)(1?1−1?2)ln(P1P2)=−(ΔHvapR)(1T1−1T2) where ?R is the ideal gas constant, Δ?vapΔHvap is the enthalpy of vaporization, ?1T1 and ?2T2 are two different temperatures, and ?1P1 and ?2P2 are the vapor pressures at the respective temperatures. The enthalpy of vaporization can be estimated using Trouton's rule, Δ?∘vap=(88 J·mol−1⋅K−1)×?bp.ΔHvap∘=(88 J·mol−1⋅K−1)×Tbp. ?=P= TorrTorr Calculate the vapor pressure of pentane (b.p. 36.0 ∘C36.0 ∘C) at the same column temperature. ?=P= TorrTorr For compounds of the same chemical class, what is the relationship between vapor pressure of a compound and retention in gas chromatography? As the vapor pressure decreases, retention time decreases. As the vapor pressure increases, retention time increases. As…The osmotic pressures of solutions of an enzyme, denoted B, in water at 298 K are given below. Determine the molar mass of the enzyme. Cmass, /g dm-) 1.00 2.00 4.00 7.00 9.00 II/Pa 27 70 197 500 785 Slope: BRT Slope: BRTIM Intercept: RT Intercept: RTIM (a) Molar concentration, c, (b) Mass concentration, cmass,B Fig. 6 The plot and extrapolation made to analyse the results of an osmometry experiment (a) using the molar concentra- tion and (b) using the mass concentration. IVc, C mass,B