Solutions

glow stick solution using 1.0mL syringe, cap, and cover in foil. 8. One by one use micropipette to add potassium hydroxide in ethanol (install micropipette tip, spin plunger button to designated volume in the display window, press the plunger button to the second stop outside of solution and hold, place tip inside potassium hydroxide in ethanol solution, release plunger button, take tip out of potassium hydroxide in ethanol solution, place tip inside 4mL vial with glow stick solution, press the…

When the first bag, which was made of distilled water (10 mL), was fully immersed into distilled water. Its mass almost did not change (Table 1). It increased from 11.9g to 11.3g after 15 minutes, but after it, the mass always kept in 11.3g during the last 45 minutes. For Bag 2, 10mL 10% sucrose immersed into distilled water, its mass increased with the time increased (Table 1). It showed that the weights increased 1.2g in 60 minutes. Also for Bag 3, which contained 30% (10mL) sucrose immersed…

Abstract: What our problem in our experiment is that distilled water gain mass because there is a higher concentration of solutes while the other solutions contain a lower concentration of solutes. The different types of liquid can affect how the potatoes change or not. Our data shows that Potatoes that were put in the distilled water gained mass while the 5% salt water, 10% salt water, Gatorade, and Coca-Cola lose mass. We also concluded that liquids with high concentration gained mass while…

diethyl ether, two layers were created, an organic yellow top layer and a clear aqueous bottom layer. The clear layer (basic layer) was extracted and placed into a container where 6M NaOH was add to the solution. The addition of NaOH made the solution basic, and created white flakes in the solution. The white flakes were separated by placing them into a Hirsh funnel filtration, the sold flakes were pure ethyl 4-aminobenzoate. After a week the powder was weighted using analytical balances…

seen above by the graphs and data, an increase in molarity of NaCl solution results in a more negative percent change in mass. Therefore, there is a negative linear correlation between an increase in molarity and the mass of the potato; additionally, there is a strong correlation, as shown by the coefficient of determination (r2) of 0.965 in figure 4. For further evidence, the potato cubes that were soaked in the high molarity solution (0.5M and 0.4M) were much smaller and harder than prior to…

How does the concentration of salt solution affect the percent change in the mass of potato cells? Hypothesis: If the concentration of salt is increased, then the percent change in the mass of potatoes cells will decrease. Abstract: In this experiment we will be testing how salt concentrations affects potatoes. First, potatoes were peeled and prepped for the experiment; while a salt water solution was being obtained. Potatoes were submerged and left in the solution for two hours, and during…

multiple beakers, samples of each solution, metal strips, a salt bridge, alligator clips, and an abrasive sponge. Then 10 mL of CuSO4(aq) and 10 mL of ZnSO4(aq) were placed into separate 250 mL beakers. A copper strip was then placed in the beaker containing CuSO4(aq) and a zinc strip was placed into the beaker with ZnSO4(aq). The two beakers were connected by a salt bridge that consisted of a string soaked in 0.5 M KI solution and each end was placed into each solution. Next, the alligator…

masses, and it was difficult to get each of the cells to have a similar initial mass. This affected the data by causing the results in the table to appear skewed. In order to properly address this issue, one could measure out a specific amount of solution to be placed into the dialysis tubing at the beginning of the experiment, so the initial masses can be as close as possible. Solute concentration has a major effect on the rate of osmosis. How does temperature affect the rate of osmosis? In…

mass was salt, followed by baking soda and sugar. This is due to the difference in the amount of solute in the solution and potato strip. The initial hypothesis was incorrect as the potato strip in a solution of salt and water had the greatest percent change in mass, though the potato strip in sugar still had a significant percent change in mass. Initially, it was thought that in a solution of sugar and water, the mass of the potato strip would…

bitter, other) were ranked. Single solutions vary by concentrations, and certain taste intensity scores increase significantly as the solute concentration increases. Binary solutions involve taste-taste interactions, and can cause enhancement and suppression of tastes (Keast and Breslin, 2003). In Figure 2., sweet and sour taste intensities of 2% sucrose single solution, 0.05% citric acid single solution and 2% sucrose & 0.05% citric acid binary solution show an increase in sweetness, and an…