I did this five times with an amount of H2O2 then changed it by 2 mL higher while keeping the amount of the cow liver the same and continued to do everything else the same. The experiment showed that the H2O2 did create a large amount of pressure when mixed with the cow liver. For example, the highest amount of pressure created by the 10 mL H2O2 was 119.83 units while the highest for the 18 mL reaction created 127.3 units of pressure. Also I observed that sometimes the pressure created from the reaction was great enough to pop the pressure sensor off the flask. This showed that my hypothesis was indeed correct and that the data was showing what I expected.
In the diffusion experiment, phenolphthalein was added to a beaker full of water. A .5 molar solution of NaOH was added, contained in a dialysis bag. The phenolphthalein dyed the water in the dialysis bag. This demonstrated the diffusion of substances across a selectively permeable membrane. The NaOH molecule was small enough to pass across the bag membrane, while the phenolphthalein molecule was too large.
I noticed that all the numbers were in a very close range during all five trials, and none of them had outliers. Through these results, we can clearly see one thing: the more hydrogen peroxide in the mix, the less time it took for the catalyst to break down the molecule. That shows the relationship of increasing peroxide and decreasing time, between the independent and dependent variables. This also supports my hypothesis, because like I said earlier, I had predicted that the increase in peroxide would cause the catalase to catalyse the molecule faster. Evaluation This was a very smooth and easy going procedure, even though the set up involved a lot little steps to do it correctly.
Step 1using a clean 10-ml pipet, transfer precisely 4.00, 3.50, 3.00, 2.50, and 2.00 ml of tap water to five separate test tubes. Step2: after rinsing the pipet with a small quantity of antifreeze, transfer precisely 1.00, 1.50, 2.00, 2.50, and 3.00 ml of antifreeze to the 70-mm test tubes to give a total added volume of 5.00 ml in each tube. Step3: stir up each tube to ensure methodical mixing of the liquids. The resultant mixtures are normally 20, 30, 40, 50, and 60% antifreeze by volume, respectively. Step4: weigh a precisely measured volume (ca.
To get accurate result, this titration process are repeated for another two times. The entire procedure by which we obtain the molarity of a solution of one substance (NaOH) from an accurately known amount of another substance (KHP) is called standardization. The average molarity of the sodium hydroxide solution will be used in the next experiment. The second experiment is conducted to determine the molarity of acetic acid and mass percent in vinegar. 100mL of distilled water was added to 10mL of vinegar and followed by 1mL of NaOH was pour into the solution.
When these factors vary, enzymes may change in shape so it will not be able to bond to the specific substance anymore. What is trypsin? Trypsin is produced in the pancreas as typsinogen originally allowing metabolic control. It is used widely in various biotechnological processes because it is very easy to be purified. Method: Material: • Trypsin • Casein • Water bath (to keep the temperature constant) • Colorimeter (to measure the rate of enzyme activity) • Thermometer • Test Tubes (to contain the casein and the buffer solution) • Stop watch (to control and measure the time) • Distilled water (to mix with trypsin to produce the buffer solution) • Test tube rack (to prevent the tubes rolling and smashing) Protocol: • Put 2.5 cm³ of 5% with reconstituted casein in 6 of the test
OSMOSIS REPORT INTRODUCTION In osmosis, water moves from a lower concentration into a higher concentration, therefore balancing the water out in both concentrations making them isotonic. In this lab we had to figure out, how different concentrations of sucrose will affect the rate of osmosis? In order to answer the question above we had to prove whether the hypothesis was true or not. If sucrose concentration increases in the selectively permeable baggy, then the rate of osmosis will increase. MATERIALS AND METHODS In order to prove the hypothesis we needed to get materials together and follow a step by step procedure.
Inside your tissue, cells are constantly renewing themselves through the process of division, although they are doing this at different rates depending on cell type. The spleen is positioned in the upper abdomen, and is the largest lymphatic organ in the body. The spleen’s role in the immune system is quite important because not only does it purify the blood it also helps the immune system with fighting off infection. The spleen is comprised of cells that are specific to maintaining a “healthy” state. Cells like B and T lymphocytes make up the spleen as well as macrophages.
The dependent variable is the rate of osmosis. The question is how does sucrose concentration affect the ratio of Osmosis? My hypothesis is as the sucrose concentration increases the rate of Osmosis will increase. MATERIALS & METHODS When conducting this experiment, we filled 4 presoaked tubes with glucose. Each tube contained a certain amount of glucose in order to distinguish a difference between each membrane first tube contained 0M of sucrose concentration and the second strip, 0.25M of sucrose concentration.
Gingko 120mg 120% 25. Glycopin 300 mcg 100% There are many more minerals in these multi-vitamins than I have in my diet. The main problem I have with multi-vitamins is their ability to break down quickly in my stomach so they will do me some good. I used to sell a powder based supplement from the Reliv Corporation, that had all the basics and being a powder, it was dissolved in water before it entered my body. They showed a test between the leading one a day vitamins in a glass of water, and