Liquid-liquid extraction

Sort By:
Decent Essays
Good Essays
Better Essays
Amazing Essays
Best Essays
    Page 1 of 38 - About 378 Essays
  • Good Essays

    the theory and practice of two laboratory techniques: solubility-dependent extraction, and recrystallization, in an effort to isolate and identify three compounds originally dissolved in a mixture. Extraction is used to isolate a specific compound. Recrystallization involves taking a crude compound and removing unwanted impurities so that a more accurate melting point can be taken, leading to a more precise identification of a compound. The overarching goal was to isolate and identify three different unknowns in a given sample using these techniques. There are two types of extractions; solid-liquid extractions involve extracting a soluble compound from an insoluble (solid) material…

    • 1249 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Benzoic Acid Synthesis

    • 1165 Words
    • 5 Pages

    This experiment was conducted to practice a variety of techniques in organic chemistry: separation, mechanisms, acid-base reactions, evaporation, recrystallization, and identification. The goal of this experiment was to identify the unknown mixture of two compounds. The two compounds were separated first by altering the acid components solubility through deprotonation, and then protonating the acid component again to form the separated precipitate. The ether in the neutral layer was evaporated,…

    • 1165 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Caffeine From Teabags Lab

    • 470 Words
    • 2 Pages

    Isolation of Caffeine from Teabags Purpose: The purpose of the lab is to separate caffeine from the teabags by using three techniques, extraction, recrystallization, and melting point determination. Procedure: 1. In the first step we have to brew a very strong cup of tea. Bring in two tea bags from home. Bring about 100 ml of water to boil in a 150 ml beaker. Add about tip of spatula full of sodium carbonate. Place the tea bags in the boiling water and let them steep for 7 - 10 minutes…

    • 470 Words
    • 2 Pages
    Good Essays
  • Decent Essays

    After the extraction, recrystallization, and determination of melting points for the unknown compound #4 were performed, and observations were noted, the results were obtained. The two compounds yielded were 4-tert-butyl phenol and triphenylamine. The masses obtained of each compound were 0.071g and 0.298g. The melting point ranges obtained are as follows; for the first the solid started to melt at 94 ˚C and was completely melted at 98˚C, and for the second the solid started to melt at 115 ˚C…

    • 638 Words
    • 3 Pages
    Decent Essays
  • Good Essays

    Recrystallization Essay

    • 743 Words
    • 3 Pages

    The main purpose of this experiment is to purify an impure solid by the technique of recrystallization. This technique involves several steps, selecting an ideal solvent, dissolving the compound in a minimum amount of boiling hot solvent, filtering insoluble impurities while the solution is hot; crystallizing the purified compound, and isolate the pure compound by vacuum filtration . The unknown used in the experiment was #4, which were white crystals. In order to determine the ideal solvent…

    • 743 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Importance Of Blender

    • 1316 Words
    • 6 Pages

    Introduction A blender generally consists of a plastic or glass pitcher that locks into a large base. Some of blenders are made of stainless steel. The lid of the pitcher has a seal that prevents the food or liquid from splashing out while the blender is in motion. The motor has varying speeds that turn either two or four sharp, stainless steel blades. The blades slice, crush and blend the contents of the pitcher..Blender is a must have kitchen equipment for nearly all families today, especially…

    • 1316 Words
    • 6 Pages
    Good Essays
  • Amazing Essays

    sugar in the sugar column and a 1 teaspoon of salt in the salt column. 12. Add a different colour of food colouring to this row. 13. In the last row add a tablespoon of tap water to the blocks in both the sugar and salt columns. 14. Place the ice tray in the freezer. 15. Set an alarm for 30 minutes. 16. After 30 minutes check how much the solution has frozen with a tooth pick. 17. Write down your observations. 18. Place the ice tray back in the freezer. 19. Repeat Steps 16 to 19 until all cubes…

    • 1362 Words
    • 6 Pages
    Amazing Essays
  • Good Essays

    Lab Report: Density and Viscosity Problem: What is the effect of density on the viscosity of a substance? Hypothesis: Density will affect the viscosity of a liquid. The order of the liquids from most dense to least dense is: syrup, detergent, water, oil Background: Density and viscosity are closey related in which they both affect one and other. Denisty has many factors like weight, mass, and volume. To work cohesivly there are different things we must pay attention to. Density is how closley…

    • 771 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Hydrostatic Force Essay

    • 976 Words
    • 4 Pages

    AIM OF THE PRACTICAL The aim of this practical was to investigate the reality or the accuracy of the formula for the resultant force on and the position of the centre of pressure on a vertical rectangular surface. SKETCH OF APPARATUS Counterbalance weight Balance pan(with 20g mass piece) Flat/curved surface(as shown below) Water Beaker Mass pieces(20g each) SUMMARY OF THEORY Hydrostatic force is the force exerted by the…

    • 976 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Pump Essay

    • 760 Words
    • 4 Pages

    3.1.3 Pump A pump is a gadget that moves liquids (fluids or gasses), or once in a while slurries, by mechanical activity. Pumps can be characterized into three noteworthy gatherings as indicated by the technique they use to move the liquid: direct lift, dislodging, and gravity pumps. Pumps work by some component (regularly responding or turning), and expend vitality to perform mechanical work by moving the liquid. Pumps work by means of numerous vitality sources, including manual…

    • 760 Words
    • 4 Pages
    Good Essays
  • Previous
    Page 1 2 3 4 5 6 7 8 9 38