Next, the “HCl” syringe was used, taking 1 mL of HCl from the “HCl” beaker, and then translated into Well #3 as well. The same filling procedure above was used to fill the other wells, but with differing amounts of each solution. In Well #2, 1.5 mL of water and 1.5 mL of HCL was used. In Well #1, 0 mL of water and 3 mL of HCl was used. Once each well was filled, a stopwatch was prepared to time the reactions that would occur in the next steps.
All colour changes were recorded. Next, the test tubes were carefully cleaned with soap and water. Then five millilitres of sample “A” was placed in the test tube labeled “A”. This was then repeated with the next three samples. Then a few drops of each sample were placed on glucose/ketone paper.
gracilis population growth between the range observed by the previously mentioned studies. We intend to study how the external pH levels affect E. gracilis’ growth rate by altering the pH levels of their environment. Because of the varying results of these multiple studies, our question is, out of three experimental groups, which pH level yields the closest optimal external pH for population growth in Euglena gracilis? We hypothesize that E. gracilis will have optimal population growth at a pH level of 7.0 due to the fact that the organism’s natural environment, freshwater, has an average natural pH level of 7.0. The previous results of Danilov and Ekelund’s experiment attest to our hypothesis because the E. gracilis cultures grown in a pH of 7.0 had the best growth
I measure one cup of tap water in a two-cup measuring cup. I will then use a mixer to move the water at medium speed (three). The mixer will not touch the bottom and will be steadied by placing it on a platform. I will then drop a square of toilet paper in the moving water while starting a stopwatch. I will time it until it breaks apart into small pieces.
To clean the syringe, flush it by drawing 6 mL of distilled water. Step 2: Mix both test tubes , shake gently and time the reaction. Step 3: The same step as procedure 1, and step 3 which is to record the observed color step 4: use the palette/color chart to help you identify the observations you make. Safety precautions: Pull your hair back Safety eye goggles Closed toe
The solution was discarded into the waste bin, and the materials were washed. The second reaction in Part B, sodium hydroxide and ammonium chloride, began by saving the data from the first reaction and setting up the LabQuest to new data collection under the same conditions as the first reaction. The cups were restacked and placed in the beaker. Using a graduated cylinder, 50mL 2M NaOH was added to the cup. The cup was then covered and the temperature probe inserted.
Millipore Milli-Q purified water was used throughout the experiment. All the glassware was acid washed and cleansed with distilled water. 10 g NaCl was taken in separating funnel and dissolved NaCl in 1000 ml of water sample, kept separating funnel with stopcock on stand vertically and added 60 ml of DCM (dichloromethane)
The variation of the concentration of sodium bicarbonate will have an effect on the rate of photosynthesis of spinach (Spinacia oleracea). As the amount of sodium bicarbonate increased the rate of photosynthesis also increased, this is because bicarbonate provides carbon dioxide (CO2) for the photosynthetic reaction which was also found in the experiment: An Assay Utilizing Leaf Disks (Guy, 1985). When completing this experiment there was one mane issue with our experiment that might have affected the results. The main issue that was faced was when the leaf disks were being exposed to the higher percentages of sodium bicarbonate while they were being vacuumed in the syringe. We found that the sodium bicarbonate was reacting with the leaf disks before they were placed
As oxygen was a visible product, we counted the oxygen bubbles made when we moved the source of light. Hypothesis: Plants need light to photosynthesize. In this experiment, the light intensity is changed by changing the distance of the source of light closer or further away from the elodea, so theoretically, when the intensity becomes stronger due to the light source being closer to the Elodea, the rate of photosynthesis should increase and
There are no obvious trends or patterns. Conclusion- If the water has more salt, then the egg will float higher, because salt makes the water's density higher by adding more mass to the water, so the egg would float height in the water with more salt. My hypothesis was supported. Egg floated the highest in the cup of water with the most salt (55 ml) with a average of 4 cm high. Egg floated the least in the cup of water with no salt with an average of 0 cm.