Concentration

The hypothesis that increasing the sucrose concentration from 6% (m/v) to 12 (m/v) would increase the rate of fermentation was not supported by the experiment. When looking at the graph it can be seen that the data obtained provided unclear results. Rather than the fermentation rate being significantly faster with a 12% (m/v) sucrose concentration throughout the entire study; the graph showed the fermentation rate for 12% (m/v) sucrose concentration was faster at times while the fermentation rate with 6% (m/v) sucrose concentration was faster at other times. During the beginning of the study the fermentation rate for 12% (m/v) sucrose concentration was slower than the 6% (m/v) sucrose concentration. Although, once it reached roughly the middle of the experiment at about 5 to 6 minute marking period the fermentation for the 12% (m/v) sucrose concentration became faster than the 6% (m/v) sucrose concentration. It is visually seen that during the 0 to 4 minute marking period the fermentation rate was not consistent for the 12% (m/v) sucrose concentration as it was for the 6% (m/v) sucrose concentration. Further along into the study during the 5 to 9 minute marking person the fermentation rate…

Different Concentrations of Saline Solutions Impacting The Mass of The Baggies Research Question: Will the different concentrations of the saline solutions impact the mass of the baggies due to the effect of osmosis. Independent Variable: The concentration of saline in each solution. Dependent Variable: The mass of the baggies(g) What needs to be controlled: The type of solution in bags. The amount of solution in cups …

This experiment determined how solute concentration affected the rate of osmosis in a cell and the outside environment. Three pieces of dialysis tubing were used as three different cells, each filled with different solute concentrations. Each one of the cells was placed in one of three beakers that were filled with tap water. The masses of each of these cells before being placed in the beakers, and afterwards in ten minute intervals for an hour. The percent difference between the initial mass…

Question: 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…

Investigation Investigating the effect of Concentration of Blackcurrant squash (Sugar) on Osmosis in Chipped Potatoes Hypothesis As concentration increases, the Potatoes’ mass will decrease Null: The concentration of sugar won’t have an effect on the mass of potatoes meaning it doesn’t affect osmosis Equipment  1 litre bottle of Ribena Blackcurrant  White cutting tile  10cm3 Measuring cylinders x2  Large Potatoes x2  Beaker  Fine Liner  Digital Balances  Cork Borer…

The results of this experiment show that as the sucrose concentration of the potatoes increases, the potato appearance, shape, and flexibility increase. The qualitative observations show the flexibility of each potato before and after the incubation. The initial observations for the potato slivers were slightly stiff and high in flexibility. After leaving the 10 mL sucrose concentration solution for 45 minutes, the results show an increase in appearance, and flexibility of each individual…

Summary Model Bifenthrin Concentration Prediction The prevalence of bifenthrin in urban Sacramento waters is most likely explained by their wide availability in for the control of ants. Although application amounts reported by professional applicators are not 100 percent correct and that of homeowners are not reported, data from the DPR PUR database indicates that bifenthrin is heavily applied by applicators in urban Sacramento. Additionally, these pyrethroids have a longer half-life than some…

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…

Beza Gebremicaheal Jacob Doherty Biology Lab Report 09/29/16 The change in concentration of sucrose affect the change in mass of potatoes cores. Introduction This experiment was focus about osmosis. If solute cannot readily move across the membrane, water will move and tend to balance the solute concentration. In this process, called osmosis, water moves across a membrane from the hypotonic compartment (with a lower concentration) into the hypertonic compartment (with a higher…

Introduction: The goal of this lab was 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, learn about the relationship between absorbance and concentration known as the Beer- Lambert law and see the relationship between moles, volume…