Case Solution Essay

When performing the separation of a mixture, it is important to note the different physical and chemical properties of the individual substances in the mixture, such as polarity (polar and nonpolar) and solubility. Also important to take into consideration is the elemental composition and chemical makeup of the substances being manipulated. In this experiment, water and ethyl acetate are the two solvents given to be used to dissolve in the mixture. The water, being polar, will dissolve in other polar

surface the hot coffee molecules break apart the sugar molecules; the molecules are broken down, because of the increase in temperature that causes the molecules to collide harder. The collision is caused by the faster, vibrating molecules in the solution. The solute (salt) is the substance that dissolves in the solvent (water) and it depends on a few things: temperature, volume, type of solvent and concentration. The solubility of most salts can be found on a solubility curve and it expresses the

Group:11 Topic:Lowering the Freezing Point of Water Due Date: 10/6/17 Background Research The scientists topic sentence is the freezing point point of water will decrease depending on the amount of solute used in the solvent. In this case it is water. The problem statement is “How much solute is needed in cvde to decrease the freezing point of water. The independent variable is the amount of solute and the dependent variable is the temperature at the point when the water will freeze

〖Co〗^(2+)in a Mixture Natalia Nole Last updated: September 12, 2016 Purpose Let’s assume that we have two solutions, a clear and a colored one, whose concentrations and identities are unknown. If we shine some light of some intensity towards them; some of this light will go through and some of it will be absorbed. This is important because based on the amount of light absorbed by the solutions we can calculate their concentrations. This important and simple principle is known as Beer’s Lambert law;

a thing and how it works in side of plant and animal cells, The potatoes and the egg did what was supposed to happen as more and more salt came into the solution the more water was pulled out of the cell and reversed and they were gaining water and adding and lose 20 to 30 g of water weight because of osmosis. If there is more salt in the solution then there will be more and more water pulled out of it. And this was 100% true because that is what happened during the lab. What we could have changed

measure conductance, which is proportional to the electrolyte concentration. Because electrolytes are charged particles that carry current in solution, the conductance of the solution depends on the concentration of the electrolytes.” (David Whyte, 2016). Finding the conductance of a substance is done by dividing the substance’s current by the voltage. In this case, the voltage would be from the 9-volt battery used in the experiment.

Investigation of Factors Affect Osmosis in Potatoes  Aim  The aim of the following experiment was to investigate the effect of  varying the concentration of sucrose solution on osmosis in a potato.  Preliminary Experiments  One preliminary experiment was done before the main experiment. From  the preliminary, we were trying to find out how osmosis actually  occurred in potatoes, and gave us a vague idea on what the main  experiment would be like.  This preliminary will aid my prediction

diameters around the wells. For exercise 5.3, dialysis tubing was filled with a starch solution. This was used to simulate diffusion of solutions across a cell membrane. It was concluded that the tube gained weight after being submerged in a beaker, meaning that some of the water and iodine solution from the beaker diffused into the tubing. This shows that the beaker solution was hypertonic to the starch solution inside the tubing. However, none of

the gummy bears were placed back into the containers and filled salt water, and left like this over the weekend. Both were filled with 1 notch over 2 ounces of water. On the third and last day, the gummy bears were extracted from the salt water solution and measured. The first gummy bear was 3 centimeters in length and .5 centimeters in width. The second gummy bear was 3.5 centimeters in length and 1 centimeter in width. Both gummy bears were smaller than the last experiment. For this lab, the effect

this method is advantageous for high molecular weight interfering samples. When a sample contains both high molecular weight interfering and non-volatile compounds, such as proteins, it is quite difficult to applied direct or headspace SPME. In such cases, restricted-access materials or membrane-protected SPME is used and a better reproducibility and accuracy result will be