Solutions

for students to learn how to use a spectrophotometer to find the 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, which is a machine that measures the transmittance and absorbance of a solution, learn about the linear relationship between absorbance and concentration known as the Beer- Lambert law…

a. Solute – the component in a solution that is present in the lesser amount, solute dissolved in the solvent b. Solution – a homogenous mixture that contains one or more solutes dissolved in the solvent c. Dissolving – where a solid is transformed into a liquid to form a solution d. Dilute – a solution with less solute dissolved in the solvent e. Concentrated – the amount of substance in a defined space, usually expressed in mass per unit volume, concentrations of different substances can be…

Then remove the soaked tubing from the water and tightly twist one end several times and either tie with a string of tie a knot in the tubing, fill the model cell with a salt solution of distilled water. We were then instructed to twist the open end of the dialysis tubing and tie it tight, dry the bag and place it into any type of solution.We collected our data by using materials such as a small scale to measure the mass of the…

Using salt solutions to observe osmosis in potatoes. D’OnJanea Washington Abstract In the lab we will be using potatoes. Potatoes are members of the family Solanaceae. Solanaceous plants originated in the new world, and the potato and its relatives were first introduced to Europe in the 16th century. The edible part of a potato, the tuber, is derived from the potato stem. It is rich is starch and has some protein just under the skin. These nutrients are stored in the potato and are intended…

compartment (with a higher concentration). In hypotonic solution, the concertation of a substance is larger within the cell; the cell gains water to dilute this concertation . in hypertonic solution, the concentration of substance is larger in solution than the cell. The cell will…

concentrations of water to low concentrations of water through a selectively permeable membrane. Osmosis is a way for water molecules to create equilibrium between a cell and its environment. For example, if the cell is a hypotonic solution and its environment is a hypertonic solution, then water will naturally diffuse to its environment to create equilibrium. The guiding question for this experiment was, “How does alcohol concentration affect the water content in cells?” It is related to…

IV. Discussion The Concentration Gradients is known as known as diffusion. They are spontaneous process because there is no energy input at the beginning (Reece et al., 2011). Each substance could diffuse to its own concentration gradient without affected by the concentration of other substances (Scott 2015).In the first experiment of the Concentration Gradients. The color of the clear water was expected to change into the color of the potassium permanganate dye, which was purple. Observation…

As stated in the introduction the hypothesis for this experiment was that the solution beginning with the higher concentration of KMnO4 and placed in water with the warmer temperature will diffuse through the artificial membrane quicker than the solutions beginning with the already diluted solutions and placed in water at a cooler temperature. This occurring because all of the solutions are trying to diffuse to where it is less concentrated because they are eager to diffuse down its…

placing them into the solutions. Also, an important observation that some of the solutions took long time to fully dissolve, for instance, the sugar > 6 hours prior the experiment, and this was not the case in the salt. 3.2. Moisture content In this experiment, two setting were conducted to see the osmotic agents and temperatures effect. Figure 1 below shows both effects on the products. Figure 1. Shows two products’ moisture content (lines are not…

diffusion of solutes and the osmosis of water through a semipermeable membrane, which was dialysis tubing. This experiment was done to examine, if the solution is hypertonic, hypotonic or isotonic. The result of this experiment was that tube 5 and 6 decreased in mass. Tube 2, 3 and 4 increased in mass. This is because in the hypertonic solution, water in the tube was flowing outwards, because the concentration of dissolved solutes was greater outside the tube than inside it. This…