Final Solution

In this lab we wanted to identify what the four mystery liquids were using density and their characteristic properties. We were initially given four liquids that were labelled numbers 1- 4, some graduated cylinders, and a scale, but we also knew that the 4 liquids were ethanol, vegetable oil, water, and cyclohexane. Using the mass that we found when we measured the liquid and using only 10 mL of the liquids we were able to calculate the density and easily identify the liquids and see if they…

Emma Kilgore Science Period 2 January 12, 2016 The Evaporation of Liquids When a liquid is left in a warm car over a certain period of time some people might notice that the liquid seems to have lessened. This is because of evaporation, evaporation is when a liquid changes into a gas because of an increase in temperature or pressure. This brings up many questions having to do with liquids and evaporation so, do all liquids take the same amount of time to evaporate?…

translocation of solutes. A solution that is hypertonic contains a higher concentration of solutes than water. Conversely, a solution that is hypotonic contains a higher concentration of water than solutes. An isotonic solution is one which has a relatively equal amount of water and solute. This is important in osmosis because the state of the solutions outside and inside the cell determine the movement of the water. For example, if the cell is placed in a hypertonic solution, the water will…

My partner and I decided to discuss how understanding the concept of pillow method could affect our relationships with our peers. The pillow method works by breaking down a problem or argument into the 5 different perspectives. Understanding all of these perspectives can be valuable insight into resolving the problem and developing empathy, feelings that a person shares with others. Jordan described an argument with his sister in which his sister believes that ketchup tastes better than mustard…

test tubes were then prepared. The Spec 20 was set to 0% and a test tube of blank solution (water) was wiped off and placed into the Spec 20. Transmittance was then set to 100% to calibrate the machine. Next, five test tubes were prepared and labeled with one of the standard solutions of 0.05 M, 0.1 M, 0.2 M, and 0.5 M CuSO4 in them. The Spec 20 was set to 600 nm and % transmittance was measured of the standard solutions. Absorbance was calculated and recorded. Then, 2 g of solid CuSO4∙5H2O was…

absorbance of four known copper (II) sulfate solutions, four copper (II) sulfate solutions that were created by dilution, and one unknown copper (II) sulfate solution. The purpose of this experiment was to help students learn how to use the Spec-20, learn about the relationship between absorbance and concentration known as the Beer- Lambert law and see the relationship between moles, volume and molarity. The serial dilution technique was also used to dilute solutions to a lower concentration.…

carrots soaked in solution A, one of our blue solutions, was 0.151 grams. Solution A had a standard deviation of 0.048. For solution B carrots, one of our clear solutions, the mean growth was 0.117 grams. Solution B had a standard deviation of 0.057. For solution C carrots, our other blue solution, the mean growth was negative, actually indicating a loss in weight. This mean loss was -1.426 grams. Solution C had a standard deviation of 0.121. We had another mean loss with our solution D carrots,…

A dilution is created when two solution are mixed together to reduce the concentration, or when water is added to a solution for the same reason. Molarity is the amount of molecules that a substance contains, for example, the amount of sodium ions in water after adding 2 grams of salt or the amount of sodium chloride molecules to in 10 grams of salt. The reason that we need to understand the molarity of a substance is to have a more controlled experiment. When the molarity of a substance is…

The purpose of this experiment is to demonstrate the molar mass by using the freezing points of the two solutions. Colligative properties were used in calculations during this experiment to discover the molar mass of an unknown solute. These properties are subsequently applied to solutions depending on the amount of particles of the solute and the solvent inside the solution. In this lab, we focus on the freezing point depression, which can be seen when a pure solvent is added to or mixed with a…

Psychology 205. This class was graded by homework 10%, quizzes 10%, papers 25%, midterm 25% and final grade 30%. After all the information of the students was provided, the average in general was solved by using the Excel program. The Excel program solved everything, I just typed in the information that was provided and the equation for the program found the solution. It came to the conclusion, that the students final grade came out to be a 77% which gives us a letter grade of a C. Everything is…