Iodine

A clock reaction is one of the most visually effective reactions that can occur within a laboratory. The landolt iodine clock reaction in particular shows a striking transformation that occurs when two colourless solutions are added together and, after a time, the solution changes to a deep indigo-blue. Clock reactions are very versatile when it comes to varying factors that allow for investigation into what impacts rates of reaction. Rates of reaction measure the speed of any change that occurs

Metals and Halogens reactions Elements such as fluorine, chlorine, bromine, iodine, and astatine belong to Group 7, Halogens. At room temperature, fluorine is a yellow gas, chlorine is a pale green gas, bromine is a red liquid, and iodine is a purple solid. Astatine is a radioactive element, therefore it exists only in small amounts. All the halogens exist in diatomic molecules. They have high ionization energies and are the most electronegative elements. Their electron configuration ns2 np5 make

The Scientific Method Portland Community College Staff* Version 42-0207-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing

The thyroid gland is butterfly-shaped organ located in the front of the neck just above the trachea connected by an isthmus [1]. the major function of thyroid gland is the Production of the T3, T4 and calcitonin hormones. Dysfunction of thyroid gland causes the shortcoming in the production of thyroid hormones. Thyroid disorders related to dyshormonogenesis e.g. (Goiter, Thyroiditis, hyperthyroidism, hypothyroidism, Graves ' disease, thyroid cancer, thyroid nodule, thyroid storm)[2]. For the diagnoses

by titration between vitamin C (ascorbic acid) & iodine solution. Hence, compare this data with the manufacturer 's specification. Principle In this analysis, certain amount of iodine solution, which is known in excess, is added to acidified ascorbic acid solution. Brown iodine can be easily reduced by acidified ascorbic acid to form colourless iodide ion: ← Equation I The excess iodine is then back titrated by standard sodium thiosulphate

Introduction: I began researching for my IA fairly soon after it was assigned, specifically by googling IA ideas for chemistry. I stumbled upon a site that described a variety of ideas concerning food. Naturally I have an interest in food and different food varieties, and my mother has constantly instilled ideas of eating healthily into me. So, I wanted to combine the two ideas in the field of chemistry. As I continued my research, I discovered some labs mentioning vitamin C concentrations in food

PLANNING Investigating the Kinetics of the reaction between Iodide ions and Peroxodisulphate (VI) ions By the use of an Iodine clock reaction I hope to obtain the length of time taken for Iodine ions (in potassium iodide) to react fully with Peroxodisulphate ions (in potassium Peroxodisulphate). I will do three sets of experiments changing first the concentration of iodide ions, then the concentration of Peroxodisulphate ions and finally the temperature of the solution in which the reaction

During the review of this scenario it was concluded based on laboratory test that were ran that the nurse was experiencing hyperthyroidism. The nurse came in due to abnormal symptoms that she was experiencing, symptoms which are often associated with thyroid problems. This lead to the healthcare providers running test to check her thyroid. Hyperthyroidism is when a person’s thyroid gland produces an excess amount of thyroid hormone than is necessary for the human’s body. Since the hormone is so prevalent

oxidizing solution using the iodine/ thiosulphate titration where the reducing solution is potassium iodate solution and the oxidizing solution is sodium thiosulphate solution. Potassium iodate solution which is an oxidizing agent is added into an excess solution of acidified potassium iodide. This reaction will release iodine. Potassium iodide is acidified with sulphuric acid and the iodine released quickly titrated with sodium thiosulphate until it become light yellow. The iodine then detected with starch

before and after. Figure 2, Diffusion of molecules before and after. From figure 2, we can observe diffusion taking place.’S’ represent starch, ‘i’ represents iodine and ‘g’ represent glucose. As initially, 1 inch dialysis tube consists of iodine and glucose and 3 inch dialysis tube consists of starch. However, after 1 hour, the iodine molecules got diffused into 3 inch dialysis tube and also the water in the beaker turned slightly cloudy in the final stage. Figure 3, the current location of