If i originally had CaCl2. I guess my second question is a more general one. You are using water to extract benadryl and methanol to extract cocaine, correct? Interestingly, the dollar bills yielded positive result with just 4 bills. I guess my second question is a more general one. However, I got a positive result when I dripped a drop of the test solution into the mortar I used to crush the pill so it must be my swabbing technique that is off or I was too impatient waiting for a color change on the swab.
Thank you for referencing the forensic book and the link, it was a new resource to me. This will favor the transfer of material from the Q-tip to the bill. You can see this procedure carried out in the video below: You will note that the positive results achieved were subtle. If i have a mixture of 0. Or is the change in color from purple to pink simply a matter of dilution water causes the solution to dilute, thus making the purple color faint and hence pink? Sully: Thank you for trying this and letting me know about your results! Thus, I did not try this recipe. The cocaine adhered to bills is transferred during note to note contact, such as in cash registers and bank counting machines. The Q-tip should be moist, but not dry.
I wonder if this is a result of you living in a more urban environment than I. To really understand what is going on in the solutions you should compare all stability constants to see what side reactions are taking place. Cobalt selenite ppt was formed only on heating - a No ppt, but the solution colour turned from pink to purple darker pink? The test has been responsible for widespread false positives and false convictions. The limiting reagent will be highlighted. Because both sellers and users handle the drug and money, cocaine can become adhered to fibers in paper currency during purchasing transactions. It would be interesting to see if other chemicals would give a false positive but we did not have time to test that yet.
I then brought in a benadryll pill the next day, crushed it, and coated a bill in it, but then still got a negative test. A diffeent reaction from the Sodium hydroxide here. Are you sure it was CaCl2, not CoCl2? The following compounds were mixed with the Cobalt salt of which 15 produced a valuable result. It is a that is used in the cobalt thiocyanate test or Scott test for detecting. I tried to detect cocaine on my money, but didn't go over the threshold, so I don't know if it was successful. To do so, I used methanol as the solvent to transfer cocaine from banknotes to a Q-tip. See the for information about the specific content types.
I found better results using water for benadryl extraction would sometimes get negative results using methanol. The limiting reagent will be highlighted. Stability constants for iron thiocyanate complexes are much larger then for iron chloride complexes - log of first constant for FeL 2- complex, where L stands for ligand is 3. The reactants and products, along with their coefficients will appear above. Filtering resulted in no coloured solution. Examples: Fe, Au, Co, Br, C, O, N, F. The solution changes back to pink upon adding some hydrochloric acid.
Propably a slow precipitation reaction of the Black solid Cobalt permanganate. However, i don't understand how you determined that it will only dilute the solution and not truly effect the equilibrium. Only few ppt was left over. Wear splash-proof goggles, apron, gloves and closed toe shoes. I don't seem to understand how to investigate the effects of the reagents on the equilibrium reaction.
Reaction stoichiometry Limiting reagent Compound Coefficient Molar Mass Moles Weight 1 129. According to Thompson and Thompson, your chances of achieving a positive test increase if you live in an urban area where cocaine use is prevalent. Cocaine is an illicit drug that is generally bought and sold using cash. Tell your students I said nice job. Excuse spelling of thread name. It's always the first step, observe the equation. Wear splash-proof goggles, apron, gloves and closed toe shoes.
Attempts to Detect Cocaine on Money: A Great Exploration for National Chemistry Week 2016
Also, if there is in fact a stress, what is the direction of the equilibrium shift? Insoluble Cobalt Silicate was precipitated. Make sure to wash hands carefully after finishing. I look forward to hearing about your future explorations! Which rate will increase further, the forward or reverse? I don't seem to understand how to investigate the effects of the reagents on the equilibrium reaction. To do so, I used methanol as the solvent to transfer cocaine from banknotes to a Q-tip. This is not a thing you want to do by hand. Make sure to wash hands carefully after finishing.
