"Melting point procedure" Essays and Research Papers

Sort By:
Satisfactory Essays
Good Essays
Better Essays
Powerful Essays
Best Essays
Page 5 of 50 - About 500 Essays
  • Good Essays

    “panacetin” + Dichloromethane Solid sucrose + aspirin + unknown component (By Filtration) Aspirin + unknown components + NaOH aqueous layer + organic layer Aqueous layer + HCl aspirin (By filtration) Organic layer Unknown (By Evaporation) Procedure and Observation: 0.30093 g of panacetin was weighed and mixed well with 50 ml of dichloromethane. After stirring the solution thoroughly‚ some solid is formed (solid sucrose) and liquid. With using a preweighed filter paper to filter the mixture

    Premium Liquid Temperature Solid

    • 674 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Naphthalene Chromatography

    • 1479 Words
    • 6 Pages

    Finding the melting point of an organic substance is a practical and efficient way for scientists to identify an unknown substance or determine a known substance’s level of purity. When organic substances are mixed together in varying degrees they take on a melting characteristic that is lower and broader than in its pure form. This property was manipulated in the lab to observe the various melting points of Naphthalene and Biphenyl when the percentage of composition was altered. A eutectic point of 45

    Premium Liquid Temperature Solid

    • 1479 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    the freezing point will be somewhat lower‚ and there will be a range of temperatures instead of a single temperature. PROBLEM To evaluate the samples‚ you will need a heating/cooling curve for pure Na2S2O35H2O that you can use as a standard. To create and use this curve‚ you must do the following. • Obtain a measured amount of pure Na2S2O35H2O. • Melt and freeze the sample‚ periodically recording the time and temperature. • Graph the data to determine the melting and freezing points of pure Na2S2O35H2O

    Premium Melting point Temperature Energy

    • 2356 Words
    • 10 Pages
    Good Essays
  • Good Essays

    Organic Lab Report

    • 916 Words
    • 4 Pages

    Background The melting point of a compound is the temperature at which the solid is in equilibrium with its liquid. A solid compounds changes to a liquid when the molecules acquire enough energy to overcome the forces holding them together. A mixture melting point is useful in confirming and used to indentify an unknown compound‚ which we will be doing in this particular experiment. Purpose Measure the melting points of pure benzoic acid and pure mandelic acid. Determine the eutectic composition

    Premium Chemical compound Liquid Temperature

    • 916 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Recrystallization

    • 2265 Words
    • 14 Pages

    Recrystallization Experiment 2: Recrystallization & Melting Point • Most important method for the purification of organic solids • Separation of compounds based on differences in solubility between the compound of interest and its contaminants • Basic technique: 1. dissolve impure sample in an "appropriate" hot solvent Part A: Choosing a Solvent Part B: Purification of Phenacetin 2. cool solution slowly to induce crystal growth 3. filter resulting mixture to isolate crystals Reading:

    Premium Thin layer chromatography Crystal Melting point

    • 2265 Words
    • 14 Pages
    Powerful Essays
  • Satisfactory Essays

    first structure is a trans isomer and the second structure is a cis isomer. Trans isomers have a higher melting point than cis isomers. b) No we won’t be able to tell the difference between the two isomers. This is because they are enantiomers. Enantiomers have the same melting point. 8. Increased intermolecular hydrogen bonding does increase the melting point. It causes the boiling point to be elevated since the molecules are more attracted to each other and thus require more energy to break

    Premium Melting point Water PH indicator

    • 737 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    filtration and melting point. Chm237 Abstract: Acetaminaphen was crushed then extracted for the active ingredient by mixing it with methanol. Then separated from the binders by centrifugation and a filtration technique using a Pasteur pipet packed with alumina. The remaining solvent was then evaporated to yield the solid analgesic(.2295g‚ 45.9% yield) which was collected by filtration and tested for the purity of the drug by the melting point determination. The melting point was (135-142

    Premium Melting point Liquid Codeine

    • 783 Words
    • 4 Pages
    Good Essays
  • Best Essays

    Page Synopsis iii 1 Introduction 1 1.1 Objective 1 1.2 Background 1 2 Theory 1 3 Procedure 2 3.1 Materials 2 3.2 Preparation 2 3.3 Recrystallisation 3 3.4 Determination of Melting Point 3 4 Results and Calculation 4 4.1 Mass 4 4.2 Percent yield 4 4.3 Melting Point 4 4.4 Appearance 4 5 Discussion 5 6 Conclusion 5 References R1 Synopsis This report is

    Premium Acetic anhydride Acetic acid Aspirin

    • 1808 Words
    • 8 Pages
    Best Essays
  • Good Essays

    What Makes Ice Melt Faster

    • 1189 Words
    • 5 Pages

    lower the freezing point of water. For the ice cream maker‚ because the rock salt lowers the freezing point of the ice‚ the temperature of the ice/rock salt mixture can go below the normal freezing point of water. This makes it possible to freeze the ice cream mixture in the inner container of the ice cream machine. For the salt spread on streets in wintertime‚ the lowered freezing point means that snow and ice can melt even when the weather is below the normal freezing point of water. Both the

    Premium Chemistry Water Melting point

    • 1189 Words
    • 5 Pages
    Good Essays
  • Better Essays

    Report 2

    • 1448 Words
    • 6 Pages

    H2O (water) * Tongs * 250 ml beaker * Test tubes * 10 ml measuring cylinder * Bunsen burner * Safety glasses * Stirring rod * Universal indicator (include pH color chart) * Electrolyte tester * Stopper Procedure 1. Observed and record the state‚ color‚ and the electrical conductivity of the magnesium ribbon and record the result. 2. Put 1 cm of magnesium ribbon into a beaker that was added with 10 ml of water (H2O) and added some drops of Universal

    Premium Magnesium Ionic bond Water

    • 1448 Words
    • 6 Pages
    Better Essays
Page 1 2 3 4 5 6 7 8 9 50