Osmotic pressure, one of the colligative properties previously discussed, is defined as the pressure used by the water flow through a membrane separating two solutions with different concentrations of various solutes. The purpose of this lab was to assist in the educating one upon the freezing points of a pure solvent compared to that of a solvent found within a nonvolatile solute, while at the same time understanding and gaining a greater depth of osmosis. I greatly enjoyed this lab, although I wish it could have been conducted in less time. Observations: I took note of several components of the lab conducted. The dialysis tubing was one I especially monitored, checking every hour with recordings.
You correctly answered: d. Because water and many plasma solutes filter into Bowman's capsule. In the presence of ADH, what component of the tubule fluid moves out of the collecting duct and into the interstitial space? You correctly answered: b. water Experiment Data: Urine Volume 80.57 40.28 26.86 16.86 Urine Concentration 300 600 900 1200 Conc. Grad. 300 600 900 1200 ADH present present present present 03/31/14 page 2 Post-lab Quiz Results You scored 33% by answering 1 out of 3 questions correctly.
In part one of the lab we used a micro scale technique to derive an activity series for metals. With the use of this technique we measured the same amount of different metal nitrate solutions into each well. Then we placed a piece of metal in the other metal nitrate solutions. With the data we recorded we resulted our activity series for the metals. We resulted that lead, silver, and copper are the strongest oxidizing agents, and that magnesium and zinc are the weak oxidizing agents.
These impurities include vanadium, arsenic, zirconium, iron, silicon, and magnesium. Therefore, impure titanium tetrachloride is then cleaned of all these impurities for the purpose of gaining a pure titanium tetrachloride. The cleaning process is initiated by allowing the former mixture to settle, where the undissolved particles are removed as dirt or mud. Afterwards, the liquid that contains several chlorides is passed through a distillation column and is chemically treated with hydrogen sulfide or mineral oil to eliminate vanadium oxychloride, which is a chloride that boils at the same temperature as titanium tetrachloride. Finally, it is redistilled again to further purify the titanium tetrachloride produced.
Thermodynamics and Kinetics of Carbonates 3/31/2014 Experimentally it was determined that with the presence of magnesium in solution, aragonite readily transforms to calcite. By analyzing the data collected by Group 7 (Friday Lab 2) it can be concluded that the presence of magnesium acts as an inhibitor for the aragonite – magnesium transformation. 1.0 Introduction The objective of this lab is to practically apply knowledge of thermodynamics and kinetics. A stronger understand of X-Ray Diffraction (XRD) measurements will also be gained. Laboratory 2/3 will follow the rate at which aragonite transforms to calcite.
The copper is then fed to electrolysis for refining. In an aqueous solution copper is dissolved at the anode, the ion moves across the electrolyte to the cathode and plates out. Cu → Cu2+ + 2 e- (anode) Cu2+ + 2 e → Cu (cathode) Aluminum are commercially extracted mainly from bauxite, which is mostly gibbsite (Al(OH)3). The Bayer process is used to refine the bauxite into alumina or aluminum oxide, which
Experimental Procedure: 250 mL of the copper solution was made by creating 100 mL of the solution, reacting CuO with HNO3, and then diluting to the mark of 250 mL. Using this stock solution, different concentrations were made and placed in the sprectrometer for observation. The absorbances and transmittances were recorded for use when identifying the amount of the color-absorbing copper ions later. A graph was plotted of Absorbance v. Molar Concentration easily see the results of the experiment. Pre-Lab Questions: 1.
Urea is an organic compound with the chemical formula (NH2) CO 2. It is highly soluble in water and therefore, a good way for the human body to expel excess nitrogen.Cinnamic acid has the formula C6H5CHCHCOOH; is a white crystallin acid slightly soluble in water. Materials: This lab consisted of two solid organic compounds Urea and Cinnamic acid. It also consisted of the Mel-temp, a pestle, a spatula, a balance weighed in mg, and tubes to put the organic compounds in. Procedures: First, we were each assigned a group number.
Name: Date: 17/02/2012 Lab Partner: TITLE: Specific heat capacity of copper INTRODUCTION: We are going to calculate the Specific heat capacity of copper, which means that we’re going to measure how much heat is needed to raise the temperature of 1kg of the substance for one Kelvin. If we know that the specific heat capacity of water is 4.18 kJ it’s possible to calculate the specific heat capacity of copper as well. The only required information we need is the mass and change in temperature both for water and copper. HYPOTHESIS Prediction: I think the specific heat capacity of copper will be pretty low compared to the water’s. Explanation: Because of copper is a good conductor compared to water because the electrons jump from one element to the other more easily in copper than water.
In this experiment the team of students must determine exactly what is in chromite sample, and also confirm the existence of all such metals that should be in the sample of chromite. The leaching technique will be used and precipitates formed via the addition of NaOH to the leach solution. The displacement of iron via zinc will also be utilized. As each metal precipitate forms in the solution, it will have to be separated from the remaining solution and the process repeated until all precipitates have been created and isolated. Next, each individual precipitate will be dissolved into an aqueous solution and ran through a spectrometer.