For example, an experiment similar to this one could be how pressure could affect the time it takes for an Alka-Seltzer tablet to dissolve. Using A flask and rubber stoppers, you can compare the amount of time it takes for and Alka-Seltzer tablet to dissolve in regular room temperature water and room temperature water in a flak but with a rubber stopper stopping the air flow into the flask. This is related to the experiment performed above because the increase in pressure from the rubber stopper stopping the air flow in and out of the flask may affect the time it would take for the Alka-Seltzer tablet to dissolve. Another example of an experiment related to the one performed above is how the amount of water used to dissolve an Alka-Seltzer tablet effects the time it takes for one to dissolve. This also relates to the experiment performed above because it also affects how fast the rate of reaction is.
To run an ACV bath, first make sure your bathtub is clean. Fill it with a shallow pool of warm water and mix in roughly one cup of apple cider vinegar. The exact measurements should vary depending on how much water there is in the tub, but generally, a safe amount would be one half to a whole cup, or roughly 100 to 250 ml. Once the bath is ready, simply soak in it like you would in a normal bath. However, make sure to limit it to around 20 minutes, as bathing in apple cider vinegar for BV requires caution.
One error that could have affected the percent yield is not filtering out all of the liquid from the filter paper in the funnel before setting it off to dry. This would have increased the final mass of the solid, not making it accurate. To stop this from happening again, the liquid could be drained more thoroughly until it fully stops dripping into the Erlenmeyer flask. Another error that could have affected the percent yield is the amount of trials performed. This would have made the results less accurate and made any errors change the final results even more.
Similarly, a slower decrease in absorbance corresponds to a low rate of reaction. Through altering the various concentrations of NaCl that Amylase is exposed to, the effect of different NaCl concentrations on rate of reaction of amylase can be determined. Research Question: What are the effects of different sodium chloride concentrations on the rate of reaction of amylase, measured the spectrophotometry. Hypothesis: Sodium chloride, temperature, pH levels are all conditions that affect the activity of an enzyme. These conditions may denature the enzyme, decreasing its rate of reaction.
Part A: Osmosis practical task Aim: To observe the effects of osmosis in rhubarb cells. Hypothesis: Water will be extracted out of the cells in the salt solution causing the cells to look different to the cells in the freshwater solution. Materials: Rhubarb Distilled water in a dropping bottle Salt solution in a dropping bottle Microscope, slides, and coverslips Forceps and razor blades or scalpel Paper Towel Method: Clean and dry a slide and coverslip. Obtain a small sample of the red epidermal cells from the stalk of the rhubarb by carefully peeling away the layer with forceps. Prepare a wet mount slide of the rhubarb tissue in distilled water only.
Once iodine was dropped onto the circle labeled “ Saliva”, it transformed into a white/ yellow Colour, due to it granting the starch to break down properly, it transformed white as a result of there being no starch, hence it executed its main action. Once iodine was dropped onto the circle, which was labeled “HCL+ saliva”, was divided into two colours, white and navy blue, this arose because the starch did not get broken down. The enzyme got denatured with the extension of hydrochloric acid of hydrochloric acid. The acid found in hydrochloric acid obtains a low level oh pH (2), causing it not to be broken down, rather to be denatured, confirms amylase can’t continue it’s activity without a particular high amount of acid, (that is found in stomach acid). My hypothesis is incorrect due to the fact that my prediction is
A low Ksp implies that the compound does not dissolve to an appreciable degree in water. If the two ions are mixed in solution, a precipitate will tend to form. If steps have been taken to remove ions that form competing precipitates, the presence of a properly colored solid can be used to confirm the presence of a given ion. If several different precipitates remain, the conditions of the solution can be manipulated to selectively redissolve one or more of the solids. When the equilibria involved are well understood, selective precipitation can be a powerful tool in the identification of unknown
13. Repeat steps 1-4 of the sodium chloride solution making and steps 1-12, for 15 trials. Cautions and Warnings Make sure the electronic balance is set to zero, before placing the tissue on it to measure the initial mass, as the estimate will be inaccurate if this step is not followed. If the initial mass of the second tissue differs from the first tissue, make sure to make adjustments to create two equal tissues. For safety issues, make sure there is a far distance between your fingers and the end of the tweezer when removing the tissue, to avoid a cut or
We are also able to better control and determine the volume of NaOH in the burette needed to neutralise HCI, CH3COOH and the unknown acid. This is because the amount of NaOH droplet can be altered when a burette is used thus, the NaOH solution can be dripped per drop at the time nearing the end point of the experiment as the colour changes rather quickly from light pink to pink. Conclusion: In conclusion, titration is an effective technique to determine the equivalence point, pH range, pKa, Ka and molecular mass of the unknown acid of the acid-base reaction. This technique is dependent on the colour change of the indicator which makes it easier to determine the end point of the experiment. Postlab Exercises: 1.
This test tube lacked hydrogen peroxide in order to keep the reaction from occuring. In two test tubes labeled “Substrate”, we mixed 0.2 ml of hydrogen peroxide with 0.1 ml guaiacol and 4.7 ml of distilled water. We also labeled two test tubes “enzyme” using a glass marking pen and filled them with 1.0 ml of turnip extract and 4.0 ml of distilled water. After the test tubes were prepared, we put the blank test tube into a cuvette and put it into the spectrophotometer in order to zero it out. While one group member set the spectrophotometer to zero, another mixed one enzyme test tube with one substrate tube and observed a change in it’s color.
This was mostly likely due the fact that the distillation method occurred last in the procedure, while the filtration occurred first. The water and sodium chloride had time to sit with one another while the rest of the experiment was being conducted, meaning that some of the sodium chloride had time to completely dissolved within the water. By the time it was placed into the evaporating dish and over the bunsen burner, it was too dissolved to be recovered. If the water was added to the mixture/filtration occurred right before distillation occurred, the sodium chloride would have been able to be removed from the water due to the fact that less of it would have been dissolved in that shorter period of time. Additionally, the sodium chloride stuck to the sides of the evaporating dish and made it more difficult to scrape it off using a scoopula.
I assume by my results that using more soap will not affect how many germs are removed, because when you get to a sertain point when the one layer of soap covers your hands when you put more layers it is harder to get all of the layers of soap to actually come into contact with your hands. But it is possible that if you use more soap and scrub with lots of friction you will get all of the new layers of soap in contact with your hands. You could also use just two or three pumps and then rinse it off and reapeat it, that will defidently remove more germs. I also assumed that antibacterial soap would give better results because it is filled with active microbial inredients which would remove more germs, but if you used normal soap and had more friction you would get the same relults as if you used antibacterial soap and washed with not much friction.
Anti-diuretic hormone is connected to release of water retention and blood dilution as a result of low sodium levels. The number of conditions, including congestive heart failure, liver failure, kidney failure and pneumonia associate with low sodium concentration, which is generally in the blood. The state also because of the thirst, excessive water drinking too much can result in overhydration. The severity of symptoms depends on how severe drop in blood salt levels much
Before starting the heating process, measure the weight of the crucible with its cover first and then tare the balance, and after that adding about 1 gram of the sample to the crucible with its cover, and then weigh it. Moreover, it is possible liberating harmful gases during the process of heating; therefore, being careful is important. The heating process ends when this sample changes the color to brown because water of hydration is removed to the sample. Additionally, give time to the small cool down and measure its weight. Next, transfer the sample to a 50 mL beaker and mixes with distilled water, which gets by rinsing the crucible with its cover in 8mL, so the solution is generated.
Water leaking through the concrete can carry dissolved salts that get deposited on the wall surface after the water has evaporated. Unlike white mold, the salt itself is harmless and is readily cleaned off. However, simply removing efflorescence does not solve the underlying problem which is the water leakage through the wall. The efflorescence will simply return over time as more leakage occurs, and as mentioned previously, the leakage can cause other serious problems. One exception is efflorescence resulting from the initial concrete placement.