A con is the higher risk of destruction of normal body flora. Drug allergy, drug toxicity, and creation of resistant microorganisms are also facts that need to be taken into consideration. Narrow-spectrum antimicrobials can only target either Gram-negative or Gram-positive microorganisms or a small variety of microorganisms at the time used. A con is that the bacteria have to be indentified first, before treatment can start. The pros are the reduced risk of creating resistant microorganisms and less chance of harming the host.
25.0 cm3 of this solution was titrated against 0.1 moldm-3 HCl and 24.5 cm3 of the acid were required. Calculate the value of x given the equation: Na2CO3 + 2HCl → 2NaCl + CO2 + H2O 6. 25 cm3 of a sample of vinegar (CH3COOH) was pipetted into a volumetric flask and the volume was made up to 250 cm3. This solution was placed in a burette and 13.9 cm3 were required to neutralise 25 cm3 of 0.1 moldm-3 NaOH. Calculate the molarity of the original vinegar solution and its concentration in gdm-3, given that it reacts with NaOH in a 1:1 ratio.
StudyBlue Flashcard Printing of Lab Final 2211L UGA http://www.studyblue.com/servlet/printFlashcardDeck?deckId=... In the distillation experiment, the purpose of a fractionating column was to Which liquid would be most easily separated from water by simple distillation? 1. 1-propanol (bp=97 degrees C) 2. 2-propanol (bp=82 degrees C) 3. tetrahydofuran (bp=65 degrees C) 4.
c. Prepare the solution by dissolving 38.90 grams of ZnI2 with 500 mL of water. d. 0.0125/0.25 = 0.05 L = 50 mL. This produces 0.0125 moles of ZnI2 5. Exercise 5: a. (0.125)(0.1) = 0.0125 moles of solute b. Pour 50 mL of the stock solution to get the number of moles needed.
It was found that the average amount of calcium carbonate in a Tums Regular Strength tablet was 520 milligrams which is 20 milligrams more than the amount claimed on the bottle. The Tums Ultra Strength was found to contain an average of 1130 milligrams of calcium carbonate in a tablet, which means that it contains 130 milligrams more calcium carbonate than listed on the bottle. Lastly, it was found that the average amount of calcium carbonate in a tablet of the Life Brand antacids was 420 milligrams, which is 80 milligrams below the amount of calcium carbonate claimed on the bottle. It was calculated that the Tums Regular Strength costs 3.7 cents per tablet, the Tums Ultra Strength costs 7.6 cents per tablet, and the Life Brand costs 3 cents per tablet. It was concluded that the most cost-effective bottle was the Tums Regular Strength due to it containing nearly the same amount of calcium carbonate listed on the bottle with a percent error of 4% while the other products contained higher percent errors.
Repeat steps 1-5 for trial 2. Variables and Control test: Independent Variable: Amount of each reactant poured into the test tubes Dependent Variable: Height of each solution Constant variables: Amount of time waiting for solution Data Table: Test tube # | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | Trial 1 | 0.5 cm | 1.0 cm | 1.1 cm | 1.5 cm | 1.5 cm | 1.5 cm | 1.3 cm | 1.5 cm | Trial 2 | 0.5 cm | 0.7 cm | 1.0 cm | 1.0 cm | 1.3 cm | 1.7 cm | 1.9 cm | 1.5 cm | Observation/Analysis: Solution turns yellow when a separate product is added, solid of the solution leaks down to the bottom after 20 minutes. Conclusion: The group tried to find the excess or limiting for the reaction between KI and Pb. In the end the hypothesis was supported by the data. We found that little amounts of each product led to a greater height of solids.
(Make a rough titration first). 5. Calculate the moles and mass of acetylsalicylic acid in an aspirin tablet. Determine the mass percentage of acid in a tablet. Data collection VolumeV / cm3 | Titration trials | | | | 1 | 2 | 3 | 4 | 5 | Initial burette reading V / cm3±0.05 cm3 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | Final burette reading V / cm3±0.05 cm3 | 13.6 | 13.9 | 14.0 | 13.9 | 14.1 | Total tire V / cm3 ±0.1 cm3 | 13.6 | 13.9 | 14.0 | 13.9 | 14.1 | Table 2 Volume of HNO3 required titrating NaOH in excess Mass of aspirin tablet ±0.001 [g] | 3.229 | 3.143 | 3.142
These products deserve close attention. The nutrition that a human body thrives from should be taken seriously. Ongoing research and a large number of studies work to reveal the legitimacy of artificial sweeteners despite the growing trend of these non-nutritive products. The word “artificial” simply means something that does not naturally occur in nature. Instead, the sweeteners are man-made chemicals.
Crown contours are normally determined by tooth anatomy, periodontal condition, margin placement, and access for oral hygiene. However, compromises must occasionally be made in the interest of aesthetics. Proper restorative contours require adequate tooth reduction to allow proper thickness of restorative materials, while allowing easy access for personal oral hygiene. The emergence profile of a restoration in aesthetic areas has two aspects: subgingival form and supragingival form. The subgingival form should follow the contours of the cementoenamel junction and support the gingival tissues.
The process is carried out by highly trained professionals. The necessary condition for having a successful dental implant is to have healthy gums and bones. Drugs, smoke and unhygienic oral condition might lead to failure of the procedure. An artificial tooth is prepared that looks like a real tooth at the visible end and has materials like titanium. Titanium is used here because it can easily form bonds with bones and gums.