Worldwide Governance Indicators

The endpoints of the pH indicator method were observed at 33.6 mL, 38.8 mL and 44.6 mL respectively. In the visual identification the endpoints were found at 33.8 mL, 39.2 ml and 44. 6 mL these value can be observed in the figures 5, 8, and 11. In the numerical differentiation method…

metals and can turn them into salt, such as calcium, turns red on blue litmus paper, is corrosive or sour-tasting when it comes to liquid, generates pain in wounds, and turns colorless when placed in phenolphthalein which is used as a basic to acid indicator ("Definition of acid in English:"). Alkalis is any kind of substance that can produce OH ions, hydroxide ions, in water, which can also be known as 'basic', or 'basicity' ("GCSE CHEMISTRY - What is an Alkali? - What is a Base? - GCSE…

Introduction: Microbiology is the study of all living microorganisms like bacteria, fungi, protozoans…etc, and non-living microorganisms like viruses, viroids and prions. The significance of identifying an unknown microorganism is first to understand what type of organism it is and what structures it has to help figure out their potential benefit, danger or even neutrality to humans. Physicians benefit from this by identifying what their patients are suffering from and how to treat them. Also…

figure out the pH of each substance we use pH paper and pH machine. Then we record the results of each substance. The reason that the results came out the way it did because procedures were follow right. When testing the substances the pH paper has indicators that help determine the color of the paper and in return the pH of the substance. The…

Pre-lab: An endpoint is indicated by some form of indicator at the end of a titration. The equivalence point is when the moles of a standard solution equal the moles of a solution of an unknown concentration. The endpoint of the solution should be a faint pink color. If the color is too dark of a pink that means that it is overly titrated. The independent variable is the amount of base being added to the solution. The dependant variable is the indicator. The constant variable is the acid…

Lactate dehydrogenase was assayed according to the method of King (1965) [21]. Reagents required: 1. 0.1 M glycine buffer: 7.5 g of glycine and 5.85 mg of sodium chloride were dissolved in one litre of distilled water. 2. Buffered substrate: 2.76 g of lithium lactate was dissolved in 125 ml of glycine buffer containing 75 ml of 0.1 N sodium hydroxide solution. This was prepared just before use. 3. 0.4 N NaOH. 4. 5.0 mg of NAD+ was dissolved in 1.0 ml of distilled water just before use. 5.…

can be determined by the white vinegar with the known concentration of sodium hydroxide from the previous lab. (Eq 2). CH3CO2H(aq) + NaOH(aq) = CH3CO2Na(aq) + H2O(l) (Eq 2) The purpose of indicator used to determine the end point of the reaction when both the reactants and product are colorless. The experiment goal of the lab is to determine the concentration of acetic acid (CH3CO2H) in the commercial white vinegar brand. Procedure and…

REFLECTIONS FOR LAB 4- FRICTION Lab 4.1 to 4.3 is about all the different frictions. We did 3 different labs. 4.1 was pulling a block across different surfaces and finding the difference in friction. 4.2 was about pulling multiple blocks across different surfaces and finding the difference in friction. 4.3 was about pulling blocks but in a bigger surfaces area. In Lab 4.1 we had to pull different blocks across different surfaces. The surfaces were a tabletop, wax paper, paper towel, fine…

Jessica Hill CHM 144M Section C Dr. Zhu Charles Dotse Aileen Decker 8 October 2015 The Quantitative Determination of an Acid in Carbonated Beverages Abstract: The basis of this lab was to juxtapose two different titration methods in their ability to identify the end point, calculate the molarity of citric acid in the two sodas, and apprehend the differences between polyprotic and monoprotic acids. In order to accomplish this, a traditional titration, with phenolphthalein, and a modern…

Calculations- Representative Fraction (RF): 0.92cm / 8.95cm = 0.10 Limitations- Ruler: +/- 0.05 cm One possible limitation for this experiment was the contamination of the chromatography paper by foreign amino acids. Any amino acids that our gloves came in contact with throughout the lab transfered over to the chromatography paper and appeared as purple spots, mostly on the border of it. Conclusion- The amino acids in unknown mixture A were Glycine and Valine. The amino acids in unknown…