What might you have used in the above experiment to get this color change to happen in the solution? At what pH would the solution have been neutral? 4. If you had walked into the lab, only to discover that you only had 0.1 M sulfuric acid available to run your tests, how might this have affected your calculations? Why?
Hypothesis: I think that it will take about 4 tsp of baking powder to fully neutralize the tablespoon of lemon juice. I also think that when I mix them together, CO2 will form. I think that it will take about 3 tsp of baking powder to fully neutralize the vinegar because the lemon juice has a higher pH level (more acidic) 5 Materials: For this experiment I will use: * Lemons (fresh) (1/2 dl) * Vinegar (1/2 dl) * Baking powder * Measurement cups * 2 Glass beakers (400ml) * 2 Stirring rods * pH paper roll * 2 pipettes Procedure: I
Which t ratio in Table 2 represents the greatest relative or standardized difference between the pretest and 3 months outcomes? Is this t ratio statistically significant? Provide a rationale for your answer. The t ratio of 4.14 represent the greatest relative or standardized difference between the pretest and 3 months outcomes. Yes, it is significant because as indicated by the asterisk, p <0.05 is the least acceptable value for statistical significance.
The absorption spectrum is measured using a spectrophotometer and the data is graphed in Excel. The peak of the line is used to find Vmax of Fe2+. Vmax is used to find the moles of Fe2+ and ligand. The unknown n is a ratio of moles ligand divided by moles Fe2+. Results and Discussion For the first part of the experiment (Part A), five different 100 mL volumetric flasks were each filled with 1,2,3,4 and 5 mL of iron (II) solution.
An experiment to show what temperature the enzyme, amylase works best at Aim: The aim of this experiment is to find out the optimum temperature at which, amylase will work most efficiently- fastest. Hypothesis: Amylase works best at body temperature, 37°c. This is because if the temperature is too low, the digestion by amylase will slow down because the kinetic energy will be low and, when the temperature is too high, the enzymes (amylase) gets denatured which means that they lose their shape and purpose. So approximately 37°c would be the best possible temperature for the amylase to break down food. Prediction: I predict that the optimum temperature that the amylase will work most efficiently will be approximately 37°C, as it is body temperature.
Experimental Data: The original weight of the mixture before separation was 4.6g. After separation the weights were as follows Grams Percent of mixture Iron Filings 1.4g 33% Sand 1.2g 28% Table Salt 0.8g 18% Benzoic acid 0.9g 21% TOTAL 4.3g 100% IV. Observations: The easiest part of this experiment was separating out the iron filings. With the magnet they separated out pretty easily. When almost boiling the sand, salt, and benzoic acid it didn’t seem like it was working.
This option essentially positions Datril as a premium analgesic drug with better efficacy but with less side effects than aspirin. This positions Datril as a direct competitor to the more-established Tylenol. Product differentiation should be achieved by: (1) leveraging on Bristol-Myers’ name and existing brands in the analgesic market; (2) perceived edge in efficacy of Datril over Tylenol being a newer drug; and (3) leveraging on other channels of distribution not exploited by Tylenol. Together with Bristol-Myers aspirin brands, this would form a vertical brand extension with Datril as the upscale brand. 2.
Both flask’s pH went up 4. Which substance, water or the buffer does a better job of maintaining pH when small amounts of strong base are added? Water does a better job at maintaining pH under these circumstances, but only slightly 5. Write equations for the reactions taking place in each of the flasks. For an equilibrium arrow ( ) is an equals sign (=) (Unless you know how to do equilibrium arrows).
Jennifer Stewart March 8, 2013 Biology 105 Lab Report- Listerine Experiment Professor Jakubowski Examination of the Effectiveness of Listerine Mouthwash in Killing Bacteria Abstract Listerine Antiseptic Mouthwash claims to fight plaque, gingivitis, and bad breath germs, by rinsing the mouthwash in one’s mouth every twelve hours. A class of about twenty-five students conveyed an experiment to test if Listerine would, in fact, kill 99% of bacteria in one’s mouth over a period of 5 minutes. The results showed that the number of colonies on the plates decreased more than 50% after five minutes of waiting for the mouthwash to work. Introduction The number of bacteria on one human’s mouth is greater than the total number of people who lived on this earth. Many mouthwash companies all claim that their product will kill 99.9% of germs every use.
Your answer : c. Yes, both for respiratory alkalosis and respiratory acidosis. Correct answer: d. No, neither for respiratory alkalosis nor respiratory acidosis. Experiment Data: PCO2 40 30 60 Blood pH 7.42 7.60 7.30 [H+] in Urine normal decreased elevated [HCO3-] in Urine normal elevated decreased 07/18/13 page 2 Post-lab Quiz Results You scored 75% by answering 3 out of 4 questions correctly. 1. When adjusting the controls, what happens to the blood pH when you lower the PCO2?