Dichloromethane

The Growing Concern of Checks What is Check Washing? According to Dictionary.com, to wash stands for applying “water or some other liquid to (something or someone) for the purpose of cleansing” (Dictionary.com). Consequently, according to this definition in this similar context, check washing deals with cleansing or erasing a check of its content so that it can be rewritten in order to change the information on the check or checks. This process is done illegally in order to scam someone of a withdrawal from their account. This fraud first came to light in the very early 1980’s according to the National Check Fraud Center. Check washing is the removal of inks of checks which is done in a very clean process using relative solvents or chemicals. For example, if a check is written with a polar ink pen, then it must be cleaned with a polar solvent and vice versa with the non-polar elements. Once the process has been learned correctly, it becomes so simple it can be done in such a short period of time that it may only take someone a few short minutes to complete the crime. The process of blotting out particular aspects of a check, allowing someone to rewrite the check for a specific amount is referred to as check washing. According to the National Check Fraud Center, a very notable bulk of check fraud is attributable to chemical alterations. Check washing, which is composed of removing or blotting some or even all of the check in order to benefit the law-breaker…

The Kd for o-Toluic acid dissolved in dichloromethane and deionized water was 19.8. This result indicates that ortho-toluic acid dissolved more into the organic phase (dichloromethane) than in the aqueous phase (water). The methyl-phenyl group is water hating (hydrophobic) and because of this would tend to dissolve in another hydrophobic solvent. This follows the results found since more dissolved in the dichloromethane. This follows the adage “like dissolves like.” The dipole interaction…

CAUTION: It is best not to get dichloromethane on your skin. Gloves are to be worn during this experiment, if improper safety precautions are taken there is a possibility of irritation, and or burning of the skin. CAUTION: Gas will build up in the separatory funnel while you are shaking it, so you must vent the funnel occasionally to prevent the stopper from popping out, causing a mess and possibly getting dichloromethane on your skin. ~During the pre-phase of this experiment it is…

A sample of this reaction mixture (100 μL) was added to dichloromethane (0.5 mL). Potassium carbonate (5 mL, 5 mmol) was added to the rest of the reaction mixture which was then placed in the sonication bath. A sample of the dichloromethane layer (100 μL) was extracted out every 8 minutes and added to dichloromethane (0.5 mL) until the 32nd minute. All the samples, along with benzaldehyde and ethyl cinnamate solutions were analysed by TLC with the eluent prepared from hexane (8 mL) and…

hexane in the jar. The Rf value was calculated using the formula located in the data for all the TLC plate. The mixed compound that was dotted on the TLC plate had 0.300 g of the impure benzoic acid and 10 mL of dichloromethane. A 50 mL flask was weighed and recorded. A separation funnel was then filled with 10mL of 3M NaOH and 10 mL of the dichloromethane. The funnel was capped and flipped upside-down while the lid was held. The solvent was mixed inside the separation funnel for a couple…

Observation, results, and calculations Observations During this experiment, it was observed that sucrose shows a soluble component which physical appearances results to be more crystal in nature and bonded together during the first separation. The separation of dichloromethane and sodium hydroxide reveal two layers of different density liquids solution whereby one is denser in nature than the other solution. The dense solution is referred to as the sodium hydroxide while the bottom layer which…

distillation to extract crude oil from cloves. The cloves were boiled in a round bottom flask and using a hydrodistillation apparatus, the crude oil was separated from the cloves and sent into a clean flask. This step was used to separate the essential oils from the cloves (Setzer, W., 2008). The distillate was poured into a separatory funnel and extracted three times with dichloromethane to extract the water. After being extracted three times, a fifth of the solution was set aside to be later…

While we thought water wouldn't mix , we predicted Dichloromethane , n-Pentanol,Methanol,Toulene and Water to mix. Again our predictions were not exact in that water did not mix with any of the substances except Methanol. This again was due to water's strong properties of hydrogen bonding, resisting to interact with molecules that do not also have strong properties of hydrogen bonding. While n-Pentanol is capable of hydrogen bonding, in reference to it's size the majority of the molecule does…

Caffeine can be initially extracted from tea leaves by boiling it in water and isolated through liquid-liquid extraction with the usage of dichloromethane and other solvents (Rebecca, Candace Seshiah, & Tissopi, 2006). Water extraction and organic solvents extraction, that uses chemicals such as methylene chloride and dichloromethane, are the most common methods for further removal of caffeine from tea (Lou et al., 2012). The objectives of this experiment are to isolate, purify, and…

experiment was to determine the purity and components of a mixture of fluorescein and bromonitroindoline, as well as separate them, through the process of thin layer chromatography. Procedure Part A- Separation of Compounds by Thin Layer Chromatography • Three 100 mL beakers and watch glasses were cleaned in preparation for this experiment. Three silica gel plates were acquired from the instructor, and to each plate a line was drawn 5 mm from the edge of the plate on both sides with a pencil,…