the experiment in test tubes A, B, and C different components of various chemicals were placed in each test tube and one was placed in the light and one in the dark. Test tube A containing DCM, dimethyl maleate, bromine, and being placed in the light. Test tube B contained DCM and dimethyl maleate which was the control substance and what test tube A and C were compared to. Test tube C contained DCM, dimethyl maleate, bromine, and was placed in the dark. After the completion of the experiment, test
Aim : In this experiment, aspirin is to be prepared via an esterification reaction and purified through recrystallization. The purity of the synthesised aspirin is determined through melting point determination. Introduction : One of the most widely used medicine is aspirin. It is best known for its pain relief for mild headaches, toothaches and muscle aches. It also acts as a nonsteroidal anti-inflammatory drug by providing relief to the swelling. Salicin, an active ingredient in salicylic acid
Experiment 3: Cryoscopic Determination of Molecular Weight Aim: The primary objective of the experiment is to calculate the total molecular mass of the compound benzoic acid in a predetermined amount of cyclohexane. Introduction: One of the key concepts in this experiment is the term freezing point depression. The definition of this phrase is that when a solute is dissolved into a solvent, their collective boiling point will be less than that of the original boiling point of the solvent. This incidentally
Amy Min Jennifer Brittle/Susanna Han Che 113-007 9/29/2014 The Relationship Between Concentration and Freezing Point Lab Introduction: In this lab the freezing point depression of water is going to be calculated. The freezing point depression is when a solvent is added to the solution, the freezing point will decrease. Then the correlation between sugar concentration and the freezing point can be observed. Sugar and salt may appear to look similar but are quite different. Sugar is made of carbon,
Is woven polypropylene suitable for packaging use? Polymer melt index Density (gr/ml) LDPE (Low Density) 0.2-20.0 0.916-0.930 HDPE (High Density) 0.2-25.0 0.950-0.960 Polypropylene 0.2-50.0 0.910-0.928 High Melt Index with low Density Properties of woven polypropylene bags • Non-Toxic :- it is not dangers product and it is not harmful to who will use it • Non-Staining :- it is not staining and it is reusable • 100% reusable
1.4 POWDER METALLURGY PART PROCESSING P/M process generally consists of four basic steps: (1) Powder manufacturing (2) Powder mixing and blending (3) Compacting and (4) Sintering. Compacting is generally performed at room temperature and the elevated-temperature process of sintering is usually conducted at atmospheric pressure. According to Narayanasamy et al. (2009), compaction process generates green strength of compacts by two phenomena, namely (i) particle sliding and interlocking (ii)
pulse and the gap between two pulses, and the mean value of the electric intensity; the characteristics of the dielectric fluid, and the manner in which it accedes in the work zone; and also the characteristics of the workpiece material including the melting and vapourising temperatures, terms conductivity and thermal capacity. The overall electrode wear can be determined by calculating the change in its mass and dimensions. Relating to tool wear, it was found that the tool/electrode wear is higher across
The next experiment is to purify impure fluorene, using the same techniques as the previous experiment. In order to crystallize fluorene, the ideal solvent have to be determined from toluene, water, and methyl alcohol. Solubility tests were able to confirm that methyl alcohol is the best solution for crystallizing fluorene, as stated in the results. Though methyl alcohol was the best solvent for this experiment, additional solvent was needed to dissolve the fluorene, because methanol has a high evaporating
This experiment was executed to study the reduction of a ketone to produce a secondary alcohol. This can be seen in Equation 1 below: Using sodium borohydride (NaBH4) as a reducing agent, the starting molecule of 9-fluorenone was reduced to 9-fluorenol. In Equation 2 shown below, the sodium borohydride is used to reduce the C=O bonds to C-OH bonds. The objective of this experiment was to not only reduce 9-fluorenone to 9-fluorenol, but also to analyze the product through melting point
INTRODUCTION In this experiment, the technique of liquid-liquid extraction will be used to separate compounds in a mixture using immiscible solvents. Each separated compound will then be evaporated/dried into a solid and used to obtain melting points to identify each compound in the mixture. Throughout experiment, pH levels needed to be managed closely. DATA AND CALCULATIONS PART A MASS OF DRY RECOVERED BENZOIC ACID: 0.0111g MASS OF BENZOIC ACID USED