Titration lab report Chemistry unit 3 Abstract In this investigation it was looked at the titration of HCL with NaOH, this is a neutralization reaction that is performed in lab in order to determine an unknown concentration of acid (HCL). In this investigation the moles and concentration of acid as well as the Ph of the solution were find out, the mole of 25ml of HCL was 0.65, concentration was 0.026 and the Ph of solution was 1.58Ph. Introduction Titration is a process to measure the volume of an end product, which is produced by reacting a solution of known concentration with a measured volume of a solution of an unknown concentration. The known concentration solution is called a standard solution, it will be added from a buret to allow measure the amount of solution which is added. The solution that is added by buret also called titrant.
Brad Hopkins CHM 145 A Shadi Abu-Baker Cheng Guo Alex Hudson 10/10/2011 Experiment #4: Ionization Constants of Weak Acids Qualitative Data: The indicator dye that we used was Blue (1). During the qualitative analysis I was able to use the shades of the buffer solutions after the dye was added to determine an estimate of the pKa of the dye. This is because according to the Henderson-Hasselbalch equation, the pH = pKa when there are equal amounts of the forms of due present. To determine when the amounts were equal, observations were made on the dye coloration. When the KH2PO4 was of a greater volume the resulting dye was yellow in color; when the K2HPO4 was in greater volume the resulting dye color was dark blue in color.
P1.4.2 has outputs but no inputs 2. DS1 should be on the level one diagram as opposed to Ds2 3. P1.2 only has an output
This results in the vapors being collected and affords one solution in moderate purity. It is difficult to separate compounds by this method unless they have a large difference in boiling points (>25 °C), or if ones is trying to removing a liquid from a solid. A similar apparatus is used during a fractional distillation (Figure 2). The primary difference is that a fractionating column provides significantly more surface area, and essentially results in repetitive simple distillations being formed throughout the column. The consecutive evaporations and condensations allow for the separation and purification of compounds with similar boiling points.
Name: Shail Shah Organic Chem Lab #2 8/29/11 Experiment #2a : Fractional Distillation of a Binary Liquid Mixture Using A Microscale Spinning Band Distillation Column Experiment 2 a Title : Fractional Distillation of a Binary Mixture Using A Microscale Spinning Band Distillation Column References: 1. Mayo, D.W., Pike, R.M. and Forbes, D.C., Microscale Organic Laboratory, John Wiley and Sons, New York, fifth edition, 2011. 2. Mayo D.W., Pike, R.M.
Components with a higher boiling points condense on the column and return to the solution ; components with a lower boiling points pass through the column and are collected. What is the difference between Evaporation and Distillation? * In the distillation method, vaporization takes place at the boiling point whereas, in evaporation, vaporization takes place below the boiling point. * Evaporation takes only from the surface of the liquid. In contrast, distillation is taking place from the whole liquid mass.
Intrathecal drugs is a rare way of administering drug directly into the CNS but there is a higher risk for systemic toxicity. Drugs administered topically is applied on a local area (skin). Transdermal is also applied on the skin via a patch which is used for a sustained delivery of drugs. All these are different routes for administering drugs but they all are different in their absorption rate. The order is as follows: Inhalation = IV > IP > IM > SC > PO > Rectal Refernces: Katzung, Basic and Clincal Pharmacology, 12th edition, McGraw Hill Publisher, Pharmacokinetics and Pharmacodynamics pg 37-53 Harvey, Pharmacology, 5th edition, Wolter Kluwer Publisher, Pharmacokinetics
One of the important aspects of organic chemistry is being able to take an impure mixture of organic molecules, identify it as a mixture and purify each component. In this lab, we will explore several methods of the identification and purification of organic compounds. As these methods will be used throughout the semester, it is important that you learn how to effectively use these methods. Purpose of Experiment 1. Identify that your Excedrin is a mixture of organic molecules using thin layer chromatography (TLC), melting point (mp) and Proton Nuclear Magnetic Resonance Spectroscopy (1H-NMR).
This method is generally applied to equipment that cannot be readily enclosed. Dust clouds are raised when dye container lids are removed and replaced, when the dye is scooped, and during carriage of the scoop to and from the weighing scale. Installation will greatly reduce the concentration of fine inhalable particles, but it is important to ensure that the exhaust current does not pass through the breathing zone of the
Question 3 The solubility of a gas in a liquid is given by Henry's law. What kind of equilibria is shown Henry's law? Ans. This is a case of physical equilibrium between a gas and its solution in a liquid. Question 4 Explain that chemical equilibria can be achieved from either side.