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. The aqueous layer was put aside in a beaker labeled “NaHCO3 Extract.” To the organic layer still in the separatory funnel, 3M HCl (10 mL) was…
a. Dry ice (CO2) sublimes (changes from a solid to gas) at -78 ⁰C at standard atmospheric pressure.…
Aim Counterfeit pharmaceuticals are a big concern regarding the issue of medicines due to fake versions containing either the wrong ingredients or inaccuracy of the active ingredient which can cause toxicity issues in patients using these products. The aim of this experiment is to find if the percentage composition of the label (50% paracetamol, 40% aspirin and 10% sucrose) matches that of the percentage composition of the powder by following 10% ranges of each component in the powder. I am going to do this via a number of methods including vacuum filtration, heating, extraction and evaporation.…
“Powder” By Tobias Wolf, is about a young lad that Who goes on a nice little ski trip with his father that separated from his mother. This trip seem to be one of those father son bonding trips. Well on their last day on what I think was christmas eve as they finished up going down the slopes it starts to snow. on their way home the snow starts to worsen. the police have barricaded the road so the two stop at a diner nearby.As they waited at the dinner the father tries talking to the son. Finally they see the police who were at the roadblock fly by. The father decides it is time time to go and they took off. They moved the saw horses that blocked the road at the roadblock and pretty soon they where driving on nothing but fresh white powder.…
In this experiment we were wanting to find the specific heat of an unknown metal and determining what metal it was by using the formula q=c X m X change of temperature. We did two trials to compare the two and see what we come up with.…
12. What is the symbol of the species that has 16 protons and 18 electrons?…
Which one of the following substances will float in gasoline, which has a density of 0.66 g/mL?…
* Mendeleev wrote the Principles of Chemistry in 1870. What did he say about the elements? (Level 5)…
CHEMISTRY JC2 Preliminary Examination Paper 1 Multiple Choice Additional Materials: Data Booklet Optical Mark Sheet (OMS) 9647/01 23 August 2011 1 hour…
copper sulfate. It changes from its normal blue color to an orange, red, or yellow. it changes…
The cation(s) present in the unknown sample are silver and iron. I know this because the precipitates and the colors of the elements precipitates matched therefore making the unknowns identifiable.…
clip_image002Outline the role of photosynthesis in transforming light energy to chemical energy (including raw materials needed for this process)…
In this lab we were give 9 different elements and had to determine if they were Single Displacement, Double Displacement, Synthesis, Decomposition and Combustion. A.) Aluminum and Copper (II) Chloride, my hypothesis is a Single Displacement. B.) Calcium Carbide and Water, my hypothesis is a Double Displacement. C.) Zinc and Hydrochloric Acid, my hypothesis is a Single Displacement. D.) Alcohol and Oxygen, my hypothesis is a Combustion. E.) Lead (II) Nitrate and Potassium Iodide, my hypothesis a Double displacement. F.) Copper and oxygen, my hypothesis is a synthesis. G Magnesium and oxygen, my hypothesis is a synthesis. H.) Acetic acid and Sodium bicarbonate, my hypothesis is a double displacement. I.) Copper (II) carbonate and Hydrochloric acid, my hypothesis is a double displacement.…
Background Information: Paper Chromatography is a separation tool in which pigment is put on a paper made of cellulose and water, and placed in a solvent, in this case isopropyl alcohol. Due to capillary action, the solvent crawls up the paper, separating the pigments. This technique is used to identify components of a mixture, even unknown ones, and can be used to isolate components into pure samples. Real world uses of this technique includes identifying certain biomolecules by pigmenting certain regions of the sample, is used in forensic sciences t analyze DNA and RNA sequencing, and is used in organic chemistry to identify unknown compounds.…
Assistant Examiners (AEs) will be contacted by their team leader (TL) through Scoris™, by e-mail…