chlorine bleaches. Now bleach - in scientific terms - is a kind of catalyst. A catalyst is a chemical that increases the reaction rate of a chemical reaction (catalyse)‚ and the chemical reaction involves enzymes. So to understand how bleach works‚ we first understand how enzymes work. Enzymes Enzymes are the most important thing in our lives‚ it makes the world go ‘round! Enzymes are proteins that acts as catalysts and help combine or break down hydrogen peroxide. Imagine a pen with
Premium Chlorine
O2(g))‚ but that would take too long. This reaction can be sped up with various methods such as modifying the temperature‚ modifying the concentration‚ or introducing a catalyst. We will be specifically looking at the effect of concentration of the H2O2 solution rather than the effect of the temperature. We will also introduce a catalyst‚ Manganese(IV) Oxide (MnO2)‚ in order to speed up the reaction so that it can occur‚ however it will be controlled so that we only look at the effect of concentration
Premium Oxygen Hydrogen peroxide
CHEM 188 – Spring‚ 2013 Hour Exam 1 (Red) February 14‚ 2011 Instructions: Your scantron answer sheet must show your NAME‚ 7-DIGIT KU ID NUMBER‚ and LAB SECTION. (Begin these entries at the LEFT end of the space provided.) In answering the questions‚ be careful to fill in the corresponding circles on the answer sheet according to the number of the question on the exam. USE A SOFT (No. 2) PENCIL. (((((((((((((((((((((((((((((((((((((( Useful information: Gas constant‚
Premium Chemical kinetics Rate equation
OZONE LAYER The Earth ’s ozone layer protects all life from the sun ’s harmful radiation‚ but human activities have damaged this shield. Less protection from ultraviolet light will‚ over time‚ lead to higher skin cancer and cataract rates and crop damage. The ozone layer is one layer of the stratosphere‚ the second layer of the Earth’s atmosphere. The stratosphere is the mass of protective gases clinging to our planet. Ozone is only a trace gas in the atmosphere only about 3 molecules for every
Premium Ozone depletion Oxygen Ozone
borohydride‚ resulting in the formation of hexacyanoferrate (II) ions and dihydrogen borate ions. The redox reaction is depicted as: [BH4] - + 8[Fe (CN) 6] -3 + 3H2O H2BO3 - + 8[Fe (CN) 6] -4+ 8H+ The reaction can even proceed without a catalyst‚ but it has been reported that it is a slow reaction‚ which follows zero-order kinetics. The progress of the reduction reaction of Potassium hexacyanoferrate (III) to Potassium hexacyanoferrate (II) was monitored through changes in the UV-visible
Premium Chemistry Sodium chloride Solubility
concentrations‚ temperature and the presence of catalyst to the rate of reaction‚ respectively. The time before the reaction proceeded was recorded and calculations were done to obtain necessary information. It was identified that increasing the reactant concentration would increase the rate of reaction. Likewise‚ higher temperature increased the rate. Finally‚ the presence of catalyst had enormous effect on the reaction rate. It increased as the catalyst was added. Based on the results obtained‚ it
Premium Chemical reaction Chemistry Hydrogen
Angewandte Chemie Photocatalyis with Visible Light Photocatalytic Nanodiodes for Visible-Light Photocatalysis** Hyun G. Kim‚ Pramod H. Borse‚ Wonyong Choi‚ and Jae S. Lee* Photocatalysts that respond to visible light (l < 400 nm) are needed to utilize the main part of the solar spectrum for production of hydrogen energy by splitting water‚[1‚ 2] purification of water and air‚[3] and other applications.[4] Traditional visible-light photocatalysts are either unstable upon illumination
Premium Semiconductor Solar cell Chemistry
The purpose of this review paper is to discuss the effect of temperature on enzyme- catalyzed reactions. This is relevant because many diseases can be diagnosed and controlled by the processes of enzyme activity (Worthington 2015). If more information is not found about enzyme activity and how it is affected‚ many diseases may go undiagnosed and uncontrolled. Temperature is a type measurement that does not only consist of heat. It is the measurement of the mean kinetic energy of any group of particles
Premium Enzyme Chemical reaction Catalysis
Name__________________________ Chemistry 190: Organic Chemistry EXAM 3 Thursday April 21‚ 2011 1. (12) ______ 2. (14) ______ 3. (20) ______ 4. (12) ______ 5. (54) ______ 6. (16) ______ 7. (12) ______ 8. (10) ______ Total (150) ______ The exam consists of twelve numbered pages and an unnumbered cover sheet. Make certain that you have a complete exam. You will have two hours to work on the exam. No books or notes are allowed; however‚ you may use a molecular model set and a calculator
Premium Oxygen Chemistry Acetic acid
BETWEEN POTASSIUM PERMANGANATE AND OXALATE ION The reaction between potassium permanganate solution is an example of a redox reaction (oxidation-reduction reaction). The reaction is slow and takes a few minutes to occur. However‚ in the presence of a catalyst such as manganese(II) sulfate‚ the reaction occurs rapidly. 2 MnO4- + 5 C2O42- + 16 H+ 2 Mn2+ + 10 CO2 + 8 H2O C. IODINE CLOCK REACTION The reaction between iodate ion‚ IO3- and sulfite ion‚ SO32- to form iodide ion‚ I- and sulfate ion
Premium Iodine Chemical reaction Chemical kinetics