Hydrogen peroxide is a poisonous chemical to all living things. Catalase converts H 2O 2into 2 separate harmless substances, water and oxygen. In this experiment we will be testing the effects of temperature, pH and substrate concentration on Catalase. The optimum pH of catalase is 7 and its optimum temperature is 37 degrees. Aim: To test the effect of change in pH, Temperature and substrate concentration on catalase in liver Hypothesis: we predict the enzyme will have its greatest reaction when it is in its optimum temperature, pH and substrate concentration Risk assessment: * Wear gloves when handling raw liver.
Possible experimental errors include not properly removing all the iron/salt/benzoic acid from sand. Residue in beaker and cups not completely removed for accurate mass weight. Another error could have been not properly drying the benzoic acid filter paper or sand mixture before weighing. Questions: A. How did your proposed procedures or flow charts at the beginning of this experiment compare to the actual procedures of this lab exercise?
However, Bentonite clay cannot be easily removed from the water, so in this project the students were instructed to modify the clay to make it magnetic and then compare its effectiveness in absorbing a model PAH against charcoal. Materials and Methods Part One In this part of the experiment, the students were instructed to magnetize the Bentonite clay. This was achieved by first preparing a 70˚C hot water bath using 250.0mL of distilled water in a 600.0mL beaker. Forty milliliters of distilled water was poured into a 250.0mL Erlenmeyer flask and placed into the water bath. About .7800g of FeCl3 and .3900g FeSO4·7H2O were added to the flask;
E. The FD&C color(s) making up the M&M’s®. = Yellow #6, Yellow #5, Red #40, Blue #1, Blue #2. Post-Lab Questions: 1.Why can't a pen be used to draw the baseline on the chromatography paper? Because the ink would bleed as well and might contaminate the results. 2.
Place one end of the filter paper in the zinc sulphate solution and the other end in the copper sulphate solution (making sure the filter paper is not touching the metals) - Using the voltmeter, touch both metals with the connecting wires so there is positive reading. Record the voltage, anodic metal and cathodic metal. - Repeat this process using an Iron metal strip in 50ml of Iron nitrate solution and a lead metal strip in 50ml of lead nitrate solution. - Combine the most reactive (anodic) metals from the first two cells, to create the next cell. This combination will determine the overall 1st and 2nd most reactive.
Another factor may include that the scent of sharpie marker was too strong for the termites to endure. Further experiments to test why the termites prefer the red ink pen to the red ink sharpie marker would include getting the chemical make up of the red ink pen and the red ink sharpie and figuring out what draws the termites to the red ink in pens rather that to the red ink in sharpie markers. To carry this out, the termites would be exposed to the different chemicals in the sharpie red ink and the red pen ink to see what particular chemical or chemicals affect the termite’s
* The test tube should be set up in exactly the same way except for the differences amount of molasses because if not they would be a different result in the lab. * The statement I can make regarding the amount of carbon dioxide produced by an organism and it activity is that it react different to the different chemical and the different amounts that you put on
In this lab, two different titrations were performed with three different antacids to determine which brand is the most effective at the cheapest price. The antacids were ground up separately and approximately 0.2 grams of it was placed in a flask. Methyl Orange, an indicator, and a stir bar were added into the flask. The flask was then put on a stir plate which was under a buret with 0.1M hydrochloric acid. The acid was poured into the flask until there was a permanent pink colour.
COMPOSITION AND SEPERATION LAB REPORT INTRODUCTION The purpose of this experiment is to study the physical and chemical properties of popcorn, sand, salt and iron fillings in order to separate them out and to find the percent composition of them. The percent composition of a component in a compound is the percent of the mass of the component in relation to the total mass of the compound. By using the percent composition, one can find the amount of water that is in a kernel of popcorn or find the total percent recovered when separating out different components of a solid mixture. EXPERIMENTAL Please refer to the Chemistry 184 Laboratory—Fall 2011 website: Lab #2 Composition and Separation Lab *Note that instead of using a Bunsen Burner, a ceramic hot plate was used. *Note that only one kernel of popcorn was used instead of several.
Clay held 93.8ml of gas, 146.2ml of oil, and 104.5ml of turpentine. For the most part our experiment followed the hypothesis. The higher porosity soil held more than sand, but since clay had such small pore spaces between the particles it held most of the pollution on top not allowing it to seep through and therefore doesn’t have the highest porosity but still held the most pollutants. INTRODUCTION Soil contamination is the invasive presence of man-made chemicals or other alteration in the natural soil’s environment. Most soil pollution comes from the use of pesticides, underground storage tanks, and the intended release of chemicals from industrial companies.