was purchased from Fluka‚ Switzerland. All the other chemicals and solvents used were of AR grade. UV SL-159 Elico make spectrophotometer was used for the studies. A standard solution of GLS (1000 µg/ml) was prepared in 0.1 M aqueous sodium acetate solution. (S1). Ten tablets (Cartilamine®
Premium Tablet Analytical chemistry Concentration
1. uncharged object such as paper? A charged object will attract an uncharged object until they touch‚ and then they will repel one another. When charged objects attract uncharged objects‚ such as when the negatively charged plastic comb or fur attracted the paper‚ the negatively charged comb/fur repelled some of the electrons in the paper. This results in a redistribution of charges in the paper so that one side is more negative than the other side. The net effect is that the paper is attracted
Premium Electron Electric charge Atom
Chem formula Type Experimental pH 1 Deidre Acetic Acid 0.1M HC2H3O2 Weak Acid 3.03 3.03 2 Acetic Acid 1M HC2H3O2 Weak Acid 2.59 2.54 3 Hydrochloric Acid 0.5M HClStrong Base 0.85 0.90 4 Jonah Nitric Acid 0.1M HNO3 Strong Acid 2.14 2.14 5 Sodium Acetate 1M NaC2H3O2 Weak Base 9.42 9.42 6 Potassium Dihydrogen Phosphate 0.1M KH2PO4 Weak Acid 5.47 5.47 7 Andy Potassium Hydrogen Phosphate 0.05M K2HPO4 Weak Base 7.71 7.73 8 Ammonium Chloride 0.2M NH4Cl Weak Acid 4.65 4.67 9 Sodium Hydroxide 0.1M NaOHStrong
Premium PH Base Acid dissociation constant
Investigating Aspirin Aims Synthesize my own aspirin Analyse the purity of my aspirin samples (aspirin and recrystallized aspirin) compared to commercial aspirin by use of analysing melting points‚ TLC plates and colorimetry tests Investigate how pH effects the rate of hydrolysis of aspirin Background theory Making my own sample of Salicylic acid (to then be converted into Aspirin) Salicylic acid (2-Hydroxybenzoic acid) can be made by hydrolysing methyl 2-hydroxybenzoate. Oil
Premium Acetic acid Aspirin Sodium hydroxide
of distillate was collected in the receiving flask. The distillate was added to a separatory funnel to perform an extraction with 5 mL of ethyl acetate. The ethyl acetate extract was then dried by adding 0.6102 grams of anhydrous calcium chloride to remove the water. The contents were filtered to remove the anhydrous calcium chloride from the ethyl acetate extract. This liquid contained the extracted limonene‚ and it was placed on a hot plate to boil off the solvent (leaving pure limonene extract
Premium
Textiles are made up from natural or man-made fibres or a combination of both. “Fibres are thin‚ hair-like structures” (Blair‚ n.d: online) that are categorized into two types: long filament fibres and short staple fibres. Natural fibres are usually staple‚ whilst man-made fibres are filament‚ with the exception of silk that comes from a natural source. These raw fibres are spun to produce a long‚ continuous thread referred to as yarn‚ which is then used in a series of methods that include‚ stitching
Premium Wool Silk Dye
solutions were 1.6‚ 2.2‚ 2.9‚ and 3.8. The measured pHs for the acetic acid solutions were 2.9‚ 3.9‚ 4.2‚ and 4.4. The pHs measured for the salts were 4.3 for sodium chloride‚ 7.3 for sodium acetate‚ 8.9 for sodium bicarbonate‚ 10.8 for sodium carbonate‚ 7.9 for ammonium chloride‚ and 6.9 for ammonium acetate. The pH for the buffer solution and the strong acid was 3.9 and the pH for the buffer solution and the strong base was 11.6. The pH of water with the strong acid added was 3.44 and the pH of
Premium PH Hydrochloric acid Acid dissociation constant
the solution cools and begins to come out of the solution. The acetylsalicylic acid is further purified through recrystallization with ethyl acetate. MATERIALS USED: Test Tubes Pasteur Pipette Salicylic acid acetic anhydride Sulfuric acid 125 mL Erlenmeyer flask Scale Water Hot water bath Ice Bath Buchner Fünnel 1% Ferric Chloride Ethyl acetate Glass Rod Iodine Aspirin Tablet Commercial Aspirin tablet METHODS Part A 1. 2.0 g of salicylic acid was placed in a 125 mL Erlenmeyer
Premium
Presence of nitrogen fixing Klebsiella pneumoniae in the gut of the Formosan subterranean termite (Coptotermes formosanus) (p3297) A Review by: Mark Edge (Faith & Jaelen Love You) Because the Formosan termite is an economically important pest. Researchers are concentrating efforts on understanding the details of their physiology. Before the late 80’s early 90’s not much physiological research was concentrated toward any one species of termite outside of general physical characteristic‚ anatomy
Premium Bacteria Microbiology Insect
1.23 NaCl 58.44 1 800.7 36 H2O 18.02 1 0.0 1.00 Experimental procedure: Aspirin (1.30 g ‚ 0.00722 mol)‚ Caffeine (0.00666 g‚ 0.000350 mol) and Salicylamide (0.390 g‚ 0.00284 mol) were combined in a 100 mL beaker. To this beaker‚ ethyl acetate (20 mL) and saturated NaHCO3 (10 mL) were added. The organic and aqueous layers were allowed time to separate before the organic layer was removed and put aside. An additional portion of NaHCO3 solution (10 mL) was added and the separation was repeated
Premium Solvent Sodium chloride Acetic acid