Abstract: The purpose of this experiment was to identify given Unknown White Compound by conducting various test and learning how to use lab techniques. Tests that are used during this experiment were a flame test, ion test, pH test, and conductivity test. The results drawn from these tests confirmed the identity of the Unknown White Compound to be sodium acetate (NaC2H3O2) because there were no presence of ions and sodium has a strong persistent orange color. The compound then will be synthesized with the compounds Na2CO3 and HC2H3O2 to find percent yield.
(1) The purpose of the separation lab procedure was to help my group members and I successfully formulate our own plan before completing the experiment, handling multiple materials and substances, etc. It acted as a step-by-step plan that guided us throughout the experiment and ensured that we were well prepared ahead of time (ie. knowing what kind of materials were necessary and gathering the correct measurements of each substance); this made the experiment day much less hectic for all of us. It made reaching our goals (achieving > 85% recovery for each substance) more realistic and convenient. (2)We predicted that we would be able to easily separate each substance from the mixture through the use of our designed procedure. By using a bar magnet, we predicted that all the iron (and only the iron) would attract and quickly maneuver its way through the beaker and into the
The purpose of this experiment is to perform a two step reductive amination using o-vanillin with p-toluidine to synthesize an imine derivative. In this experiment, 0.386 g of o-vanillin and 0.276 g of p-toluidine were mixed into an Erlenmeyer flask. The o-vanillin turned from a green powder to orange layer as it mixed with p-toludine, which was originally a white solid. Ethanol was added as a solvent for this reaction. Sodium borohydride was added in slow portion as the reducing agent, dissolving the precipitate into a yellowish lime solution.
Experiment 1 In the first experiment, half a gram of magnesium was combined with 3 milliliters of hydrochloric acid in a glass beaker. The magnesium looked like a gray powder. The hydrochloric acid appeared to be clear liquid and looked very similar to rubbing alcohol. Before, the reaction took place the magnesium and hydrochloric acid weighed 4.44 grams when weighed together.
The lab testing consists of investigating the rate of oxidation of Acid Sulfate Soils with variant temperatures. Since the transformation from PASS to AASS involves a significant pH drop to approximately one, rate of reaction and time was measured until the pH levels in the reaction even out at a low pH of approximately one. Appendix A & B demonstrate the oxidation reaction trials for each temperature over time, with pH levels recorded once every second. The time when the data stopped recording was determined when either the reaction had finished, or the time exceeds twelve minutes. This time limit was set due to a constricted time allowance of experiments.
Low-Risk level encompasses simple admixtures involving closed-system transfer, measuring, and mixing of three or fewer sterile products. Some of the things low-risk compounding include are, CSPs are compounded using aseptic technique within an ISO Class 5 PEC that is located within an ISO Class 7 buffer area with an ISO Class 8 ante area. Each container, including the final container, cannot be entered more than twice to prepare the CSP. There is a limitation to aseptic manipulations of disinfected containers using sterile needles and syringes. Medium-Risk level encompasses preparations requiring more complex compounding processes.
Lab Report Experiment 6 Rates of Chemical Reactions By Nikhola Mirashirova Lab Partner: Dina Abetova Section 3, Saturday October 31, 2015 Introduction Rate reaction is the measure of the change in concentration of the reactants or the change in concentration of the products per unit time.1,2 Rate law for this experiment: Rate = k(I-)m(BrO3-)n(H+)p There are several factors which affect the rate of reaction: catalyst, reactant concentration, and temperature.1,2 A catalyst is a substance that changes, increases or decreases, the rate of a chemical reaction but is not being used up during the reaction.3 It provides an alternative way, so that the rate of reaction changes.4 Catalyst, which is used in this experiment, is (NH4)2MoO (0.5 M).
Major unknown #202 was given out by the instructor, and the unknown bacterium was streaked out on a Trypticase Soy Agar tube and plate to inoculating the bacterium and incubating. After incubated and grown the morphology was observed and several Gram stains were performed to determinate if the bacterium were gram positive or negative, and the morphology of the bacterium. The Gram Stain of my major unknown #202 was determinate to be Gram negative bacilli, and was double checked by the Gram check slide. Also I noticed that my bacterium was a facultative anaerobe and according to my results of endospore test, my bacterium has not endospores. So according to the list of possible major unknowns provided by the instructor, I narrow my bacterium thru
In this lab, the experiment consisted of multiple reactions performed in a cyclical manner to begin with solid, elemental copper and end with solid, elemental copper. The first and fifth reactions are oxidation-reduction, or redox, reactions, where a transfer of electrons occurs, changing the charge of an element or ion. Redox reactions are often a type of single replacement reactions, in which one elemental species will react with another molecular species, producing another elemental solid out of the metal of the molecular species, as well as a new molecular species with the original elemental species and the ion or non-metal from the original molecular species. For example, if elemental zinc (Zn) were to react with hydrochloric acid (HCl), the chlorine from the hydrochloric acid would bond with the zinc to create zinc chloride (ZnCl2), leaving the hydrogen (H2) as a diatomic gas. The second reaction is a double displacement, in which two species, both consisting of two parts, essentially switch partners with each other.
Equation 3.1 can be simplified to the following equation γ(t,m;m_m )= e^(α-βm)/〖(t+c)〗^p (3.2) Where a_0=a+bm_m , α=a_0 ln10 and β=b ln10 are defined. |γ_m (t,m;m_m )|=|∂γ(t,m;m_m )/∂m|=e^α/〖(t+c)〗^p βe^(-βm) (3.3) Where |γ_m (t,m;m_m )| represents the absolute value of the partial derivative of γ(t,m;m_m ), and it is the instantaneous daily rate density of aftershocks of magnitude m at time t following a main-shock of magnitude m_m. e^α/〖(t+c)〗^p denotes the mean instantaneous daily rate of aftershocks at time t following the main-shock of magnitude m_m. βe^(-βm) is the exponential probability density function of aftershock magnitudes.