Iodide Essays

Experiment 2: Preparation and Spectrophotometric Analysis of Copper(I) Iodide Abstract: This experiment aims to determine the concentration of “Purified CuI” sample. Crude CuI is obtained by reacting CuSO4.5H2O with KI and Na2S2O3 in de-ionized water. A series of decanting and centrifugation is carried out to extract the crude CuI. Crude CuI was later purified by dissolving it in hot KI solution. The solution was later transferred into de-ionized water and placed in an ice bath to allow for re-precipitation

People are not truly good at heart “In spite of everything I still believe that people are really good at heart.” These words were spoken by Anne frank. She wrote these words in her diary in the attic of her father’s business. She was hiding from the Nazi’s, and hid among several other people in a confined area. Anne thought that everyone was truly good-hearted. She sadly died in a concentration camp about a year later.The truth is people are not good at heart. people are selfish, they are in

• Iodine Solution Weigh 7.7g of potassium iodide into a 50cm3 beaker. Use distilled water to help the iodide dissolve. Swirl for a few minutes until the iodide has completely dissolved. Using a funnel to help, pour the potassium iodide into a 500cm3 volumetric flask, make sure all traces of the solution is in the volumetric flask. Using distilled water would be a good method in order to rinse the beaker. Make the solution up to the 500cm3 mark with iodine (1% concentration) • Starch Indicator Solution

Samarium (II) Iodide A single electron transfer reagent useful for organic synthesis. A look into samarium (II) Iodide (Sml2), a powerful single electron donor which plays a vital role in the chemoselective reduction of certain functional groups and carbon-carbon bond formations. Cathal McKenna Student Number: 11322441 10/6/2014   Introduction Samarium (II) Iodide has emerged in recent times as a very useful reagent in organic synthesis. The compound was first used by Kagan and his researchers

Experiment 2 Preparation and Spectrophotometric Analysis Of Copper (I) Iodide (CuI) Abstract The aim of the experiment was to obtain pure Copper (I) Iodide (CuI) and to determine the mass percentage of copper in the purified CuI sample .Crude CuI was obtained by redox reaction of Copper Sulphate pentahydrate (CuSO4.5H¬¬2O) and Potassium Iodide. The crude CuI was further purified to obtain pure CuI. Standard solutions with known concentrations of Cu2+ ions, ranging from 0 to 0.0032g/L was prepared

Introduction 1.1 Aim: To determine the kinetic parameters, Vmax and Km, of the alkaline phosphatase enzyme through the determination of the optimum pH and temperature. 1.2 Theory and Principles (General Background): Enzymes are highly specific protein catalysts that are utilised in chemical reactions in biological systems.1 Enzymes, being catalysts, decrease the activation energy required to convert substrates to products. They do this by attaching to the substrate to form an intermediate; the

Introduction When solutions have a lower concentration than the solution that is surrounding them, then that solution is known to be hypotonic. When solutions have a higher concentration than the solution that is surrounding them, then that solution is known to be hypertonic. When a solutions concentration has the same concentration as the solution that is surrounding it, then that solution is known to be isotonic. Osmosis is when molecules move from high concentrations to low concentrations with

Hydrogen peroxide • I- = Iodide ion (from potassium iodide) • H+ = A proton, from hydrochloric acid (HCL) • I3- = Triiodide • H2O = Water Equation 1 shows that hydrogen peroxide reacts with iodide ions in acid solution

This lab involves concentration and molarity. In order to understand, some words must first be defined and understood. According to our 15-1 Review and Reinforcement worksheet, a solution is “a homogeneous mixture of two or more substances in a single physical state” (15-1 Review and Reinforcement). A solution has small particles, is evenly distributed, and will not separate on its own. Some examples of solutions are soda and salt water. Concentration, which we will be a factor in this lab, is the

clock reaction, a reaction between sodium persulfate and potassium iodide. During the experiment, a colourless solution of potassium iodide and a solution of sodium persulfate, starch and thiosulfate will be combined into a beaker to later react into a blue-black complex. The elapsed time from when colourless solutions are combined to the colour change is dependent on the reactant concentrations of sodium persulfate and potassium iodide. Experiments will be conducted by systematically varying the concentrations

potassium iodide solution to the water. We slowly stirred the mixture to make sure the potassium iodide was completely even throughout the water. We then took a dialysis bag and soaked it in water for few seconds to make it easier to open up the seal. We tied up one end of the dialysis bag with a piece of string and filled the bag with 13 mL of dissolved cornstarch in water. Then we tied up the other end of the dialysis bag with a piece of string and placed the bag into potassium iodide and water

mix potassium iodide, hydrochloric acid, starch, thiosulfate and hydrogen peroxide. The time it takes for the reaction mix to turn blue will be measured with a stopwatch. For the procedure, you will vary the amount of hydrogen peroxide to see how this affects the time the mixed chemicals stay clear before turning blue. The reactions that form the basis for the iodine clock reaction are shown below. Equation 1: H2O2 + 3 I- + 2 H+ → I3- + 2 H2O • H2O2 = Hydrogen peroxide • I- = Iodide ion (from potassium

peroxide is mixed with one containing potassium iodide, starch and sodium thiosulfate” in order to create a mixture where the solution suddenly turns a dark blue color ("Iodine Clock," 2015). I had been thinking how I could turn this into a fun competition and how I could manipulate the experiment when I thought that I could try to experiment to find

Lucas Wang 1. Title: Amount of Elephant Toothpaste Created With Different Amounts of Hydrogen Peroxide. Important: H.P. = Hydrogen Peroxide; P.I. = Potassium Iodide 2. Introduction - The Question: How does adding more or less hydrogen peroxide to potassium iodide and dish soap affect the amount of foam produced? The world of chemical reactions is none less than an absolutely fascinating one. There are many experiments or tests you can perform to explore this intriguing topic. A chemical reaction

AIM: The experiment is to investigate the effect of the change in the concentration of Hydrogen peroxide and sodium thiosulphate on the rate of reaction between potassium iodide (KI), hydrogen peroxide, Sodium thiosulfate (Na2S2O4) under acidic condition. Introduction: The rate of reaction can be defined as the rate at which the reactants are consumed of the rate at which product is formed. It is the ratio of the concertation of reactant used of concentration product to time, it measured in mol

point. There are several ways to determine the concentration of vitamin C, and redox reaction is one of the ways to figure out the concentration. An oxidation–reduction reaction starts when iodate ions combines with an acidic solution that contains iodide

Based on the products made, my predictions of chemical reaction type were correct. The reaction between lead (II) nitrate and potassium iodide can also be categorized as a redox reaction. The reaction between magnesium metal and hydrochloric acid can also be categorized as a neutralization reaction. The investigation can be explored further by varying the concentration of reactants, the

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. Once the magnesium and the hydrochloric acid were mixed together, the bottom of the beaker felt warm and it started to

7) Discussion: The goal of this experiment was to covert 1-butanol into 1-bromobutane. By reacting 1-butanol with bromine, a nucleophilic substitution would occur where the alcohol group from 1-butanol is replaced with a bromine. In order for the -OH group to depart, its conjugate acid would have to be a strong acid. The conjugate acid for a hydroxyl group is water, which is a weak acid. To get the reaction to occur, 1-butanol would have to be reacted with sulfuric acid to protonate the -OH group

amount of Vitamin C in a solution by a redox titration reaction using iodine. The iodine would be added during the titration, the ascorbic acid would become oxidised to dehydroascorbic acid (a colourless chemical), and the iodine would be reduced to iodide ions. [6] This is because ascorbic acid loses the hydrogen atoms (2) to the iodine and dehydroascorbic acid is formed. [4] The acid itself is a powerful anti-oxidant and a reducing agent that is capable of donating one to two electrons in redox reactions