Iodine

Manganese and Iodine are both elements on the periodic table. Both are used greatly in our lives every day. Manganese is a brittle metallic element that is important in many industrial processes. It was discovered by Carl Wilhelm Scheele in 1774. Manganese was given its name from the Latin word magnes meaning magnet. Manganese belongs to a set of elements called the transition metals. Manganese is the 12th most common element found in the earth’s crust and is the 4th most common medal mined

Iodine was discovered by Bernard Courtois in 1811. Later the English chemist Humphry Davy and the French chemist Gay Lussac studied the substance separately and ended up identifying it as a new element. Both chemists gave the credit to the Courtois discovery. Iodine is a non-metal and it is part of the halogen group in the periodic table of elements. Iodine is the second less

(C6H8O6) and iodine (I2). About 75.0 mL of standard ascorbic acid solution was measured in a graduated cylinder. It was then placed in the beaker labeled ascorbic solution. About 100.0 mL of iodine solution was measured using a graduated cylinder. The measured solution was then placed in the beaker labeled iodine. From the iodine previously gathered, about 55.0 mL was measured and placed into the burette. All of the solution did not fit into the burette. The burette was filled until the iodine solution

Kinetics of the Harcourt-Essen Reaction Name: Manpreet Kaur Candidate Number: 7123 AS and A2 Aims: AS AIMS: 1. Investigate the effect of temperature on the rate of reaction. For this aim 3 sets of results will be obtained by timing how long it takes for the colour change to occur in different temperatures determined by the use of an electric water bath. With these results, the effect of temperature on the rate of reaction will be investigated. 2

CHEMICAL KINETICS: IODINE-CLOCK REACTION DATE SUBMITTED: 14 DECEMBER 2012 DATE PERFORMED: 7 DECEMBER 2012 ABSTRACT Chemical kinetics involving reaction rates and mechanisms is an essential part of our daily life in the modern world. It helps us understand whether particular reactions are favorable and how to save time or prolong time during each reaction. Experiment demonstrated the how concentration, temperature and presence of a catalyst can change the rate of a reaction. 5 runs of dilution

bisulfite ions, which is studied in this experiment, is known as the Iodine Clock Reaction System. There are three reactions in this experiment. First, when there is HSO3- in the solution, the iodate ions are reduced to iodide ions. This is a slow reaction. IO_3^- (aq)+3HSO_3^- (aq)→3SO_4^(2-) (aq)+ I^- (aq)+3H_2 O(l) (Reaction 1) After all of the HSO3- is consumed, iodate ions are changed to molecular iodine. 6H^+ (aq)+IO_3^- (aq)+5I^- (aq)→3I_2 (aq)+3H_2 O(l)

Introduction: Iodine-131 is a synthetic radioisotope of the element Iodine and is commonly formed in nuclear reactors. Other isotopes of Iodine include iodine-129, iodine-124 and 123 which is commonly used in medical imaging and the less common iodine-125 which can be used to treat cancerous tissue.1 As Iodine-131 is a radioisotope it undergoes radioactive decay in order to stabilise itself. Iodine-131 undergoes a type of radioactive decay called beta negative decay (-), where a neutron in the

The ‘Landolt iodine clock reaction’ is a well known experiment characterised by a notable clear-to-blue colour change. This experiment is often used to determine the rate at which reactions take place. This colour change transpires when I2 reacts with 1% starch and NaHSO3 to form a blue starch and iodine solution. The rate of reaction is accurately recorded with a stopwatch as soon as the blue colour change is visible to the human eye. Rates of chemical reactions can be defined as “the amount

major global strategy of choice for feasible and effective control of iodine deficiency. Iodization levels are usually measured based on estimated consumption of salt, with an estimated individual average consumption of around 10g of salt per day in countries where most of the salt in the diet comes from table salt, used for cooking and at the table. It is recommended by the WHO, UNICEF and ICCIDD that, 20 mg to 40 mg of iodine per kg salt be added to food products depending on local salt intake (15

Kaelyn Bruschi Professor Weisberg Iodine Clock Lab Paper The objective of this experiment was to determine the role of various chemicals in a reaction, to determine how concentration affects the rate of the reaction, and to determine how temperature affects the rate of the reaction.  Both concentration and temperature greatly affect the rate at which the reaction occurred, and changing the concentrations of the reactants or the temperature at which the reaction occurred changed how quickly the reaction