Need solution to all parts urgently The solubility of 1,1,2-trichloroethane in water is 4500 mg/l; the vapor pressure is 30.0 mm Hg. Compute Henry’s constant in units of: a) atm b) dimensionless mole fraction c) atm∙m3/mol d) dimensionless concentration
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Need solution to all parts urgently
The solubility of 1,1,2-trichloroethane in water is 4500 mg/l; the vapor
pressure is 30.0 mm Hg. Compute Henry’s constant in units of:
a) atm
b) dimensionless mole fraction
c) atm∙m3/mol
d) dimensionless concentration
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- Polycarbonate, PC, is used for aircraft canopies. A batch of this polymer was found to fail prematurely when impacted by a 4 pound bird during qualification studies. You suspect that the problem is due to a molecular weight difference for this particular batch of polymer compared to previous batches. You decide to perform dilute solution viscosity studies to determine the Mol.wt. Assume density is 1.2g/cm3 What solvent would you use? Justify your answer Please answer very soon will give rating surely(This question and the next 2 questions are breakdowns of the same question) A student John wanted to measure the molar mass of an unknown material (UM) via the boiling point change of a solvent. He chose a solvent, ethanol, that can dissolve the material and sugar. He wanted to use sugar (MW = 342.3 g/mol) as a reference sample to get an ebullioscopic constant for his system to reduce the effect of other measuring errors such as pressure, measuring errors, and impurity of the samples. He made 10 solutions each contain 100 g of ethanol and various amont of solute as list in the table. He fits the two sets of data and obtain the molar weight of the unknown materials. For this question answer the fitted boiling point of pure ethanol: ____ K. 4 sig. fig. Thre rest ? marks in the tale will be answered in the next two questions. Copy the data into Excel and use trendline to fit or calculate the average values for this and the next 2 questions. Sample # Sugar (g) B.P. (K) Sample # UM…Volumetric pipettes are designed to deliver a precise amount of liquid, but only if you a. submerge the end of the pipette into a solution you are delivering. b. allow the pipette to drain freely, and leave any residual solution in the pipette. c. hold the pipette at a 45 degree angle and ensure that all the liquid is delivered.
- a. Colloidal particles typically have a negative surface charge that attracts oppositely charged positive ions in the surrounding bulk solution. These so-called _______-ions are held at the particle surface through electrostatic and van der Waals forces of attraction strongly enough to overcome thermal agitation. b. Turbine and propeller type mechanical mixers used for rapid mixing of reagent chemicals have either ------------- flow impellers with flat or curved blades located parallel to the axis of the drive shaft, or --------------------- flow impellers with blades making an angle of less than 90o with the drive shafA chart is prepared by plotting In Ksp versus 1/T, using data obtained by performing a lab experiment. Refer to the attached photo for reference on how to solve these equations. Particularly #5 should be useful: A linear fit of the data in the chart yields the equation y = (-5.0020x10^3)x+(2.100x10^1) with an R2 value of 0.9922. Determine the enthalpy (deltaH in kJ) associated with dissolving KNO3. Answer in scientific notation with appropriate sigfigs.What is the narrow graduated piece of glass equipment called? Why do you use an Erlenmeyer flask instead of a beaker to collect the solution? Why do you need a white piece of paper? What is the part called that you adjust to change the flow of solution out? What is the name of the curved surface of a liquid in a tube called? Video: https://www.youtube.com/watch?v=sFpFCPTDv2w
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