With the use of this technique we placed chlorine, bromine, and iodine into solutions containing chloride, bromide, and iodide. In the reaction the free halogen (X2) oxidizes the other halide ion (Y-) and gets reduced by gaining electron(s). In table 3, chlorine was the strongest oxidizing agent and iodine was the weakest oxidizing agent. Since chlorine was the strongest oxidizing agent it will react more and the weak agent will react less. This explanation can be demonstrated in table 3 also because the results of the reactions demonstrates that chloride reacted more by the color of the product compared to the color of chloride in the mineral oil.
2-propanol (bp=82 degrees C) 3. tetrahydofuran (bp=65 degrees C) 4. 1-butanol (bp=118 degrees C) 5. butanone (bp=80 degrees C) Give a better separation for the mixture to be distilled tetrahydofuran (bp=65 degrees C) because it is farthest from 100 degrees C Which alkyl halide would react fastest in a nucleophilic substitution using silver nitrate in ethanol (weak nucleophile, protic solvent)? 3-bromo-3-methylpentane (most
The melting point of the unknown was determined to be between 90-110 degrees. Based on the melting point we identified the identity of the unknown as Acetanilide. Acetanilide is an odorless, white flake solid or crystalline powder (pure form) which is soluble in hot water alcohol, ether, chloroform, acetone, glycerol, and benzene. Acetanilide is used as an inhibitor of peroxide sand as a stabilizer for cellulose ester varnishes. Acetanilide is also used as an intermediate for the synthesis of rubber accelerators, dyes, and is used as a precursor in penicillin synthesis.
Results APPEARANCES OF MATERIALS USED Substance Physical Appearance Zinc Carbonate White; powderish Calcium Hydroxide White; powderish; like zinc carbonate 3 M HCL Clear liquid, resembles water 20 mesh granular zinc Grey, metallic, shiny 3% hydrogen peroxide Clear liquid; resembles water Manganese dioxide Very dark grey, black and powdery Copper sulfate Blue, crystalline in structure. Sky blue Zinc iodide Very dark purple, shiny and crystalline in structure 0.1 M acetic acid Clear liquid, resembles water Zinc oxide Very white powdery substance RAW RESULTS Data Specifided (Page 112 CRC handbook) Raw data Volume of Gas Collection Bottle (Average of 3 Trials) 14.04mL Mass of boiling tube (empty) 41.57g Mass of boiling tube with zinc carbonate 43.42g Mass of zinc carbonate 1.75g Volume of water in gas collection bottle after reaction 78.5mL Volume of gas product collected 185.2mL Mass of solid product with boiling tube after reaction 1.11g QUALITATIVE TEST RESULTS Group # Test Observation: Standard Positive/Negative Observation: Experimental Positive/Negative 1 H2 HCL + Zinc bubbling + flaming stick POP! + + flaming splint no POP - 2 CO2 Turned cloudy + Negated from experiment Negated from experiment 3 O2 MgO2 + Hydrogen Peroxide bubbling. Glow stick re-ignited + + wooden splint; glowing stick went out - 4 H2) Added 1 pea size CuSulfate + 1 drop of deionized water; blue, positive + Copper sulfate did not change color when put into wet filter paper - 5 Zn (OH)2 Zinc iodide + 3mL H2O Clear suspension + Visual inspection; cloudy. Acid test= solid + 3M Acetic acid cloudy + 6 ZnO ZnO + Heat yellow Zn Cooled White + ZnCO3 + heat yellow solid.
It is quite like ethylene glycol. It has a boiling point of 188.2°C and a melting point of -59°C(7). What are the specific heat capacities of glycerol, water and olive oil? Glycerol: 2.5 J/g/°C (4) Water: 4.18 J/g/°C (2) Olive oil: 2.0 J/g/°C (3) How do the properties of these three liquids compare to the properties of the liquids used in radiators? Glycerol has some useful properties.
Today, lasers are the most comment method of tattoo removal. They work by targeting the ink with pulses of high concentrated light the break the ink into tiny fragments, which are then cleared away by your own immune system. However, this isn’t done in just one treatment. The more treatments you have the more the laser and penetrate and destroy the ink. Laser removal can be very painful as well as expensive.
Drugs can be delivered directly under the skin (subcutaneously). It is useful for efficient, slow, and even absorption for sustained effects on the body but drug substance can be irritating. Inhaling drugs can be a great way of administering a drug considering the rapid absorption and avoidance of hepatic first pass metabolism. But there is not really a good way of regulating the dose. Intrathecal drugs is a rare way of administering drug directly into the CNS but there is a higher risk for systemic toxicity.
INTRODUCTION Copper (II) sulfate is an inorganic salt with the formula CuSO4. This salt exists as a series of compounds that differ in hydration. The anhydrous form is a pale green/gray-white powder, whereas the pentahydrate (CuSO4•5H2O), the most commonly encountered salt and the salt that was used in this lab, is bright blue. A pentahydrate means that five water molecules attached copper (II) sulfate within a hydrate. Copper (II) sulfate is a bright shade of blue, and very toxic to the environment, irritating to the eyes and skin, and also can cause damaging effects if swallowed.
The average number of time the termites spent on the red ink pen circle was much greater than the amount of time the termites spent on the red ink sharpie marker circle. It can be concluded that termites would rather stay on the red pen circle than on the red sharpie ink circle. Reasons why the termites spent a lower average amount of time on the circle drawn in red sharpie ink can be based on many factors. One of them being that the chemical make-up of the red ink in sharpie markers does not agree with the termites. Another factor may include that the scent of sharpie marker was too strong for the termites to endure.
(h) "Hard" water contains a high concentration of calcium ions. Suggest a way to make hard water "softer: Answers: a) It could have been improved if the experimental design said " you have to place seven different nitrates in three different sodium solutions to see if a reaction occur." b) With my evidence silver nitrate was the would the cation that would make most of the anions create a precipitate. c) Chlorine can selectively remove silver ions from a solution because silver has a positive 1 charge and chlorine has a negative 1 charge so when they react it is a perfect