OxidatiOn and ReductiOn OxidatiOn & ReductiOn 9.2 9 Introduction to oxidation and reduction Redox equations Some common oxidising agents and reducing agents (EXT) 9.3 Reactivity 9.4 Voltaic cells 19.1 Standard electrode potentials (AHL) 9.5 Electrolytic cells 19.2 cORe 9.1 Electrolysis (AHL) TOK Are oxidation numbers real? I remember contemplating on the nature of reality back in Chapters 2 and 4‚ with regard to electrons and hybridization respectively
Premium Electrochemistry Hydrogen
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‚ SO42- is known as the iodine clock reaction. KIO3 + Na2SO3 KI + 3 Na2SO4 When the sulfite ions are used up‚ the reaction is over‚ and the excess iodate ion‚ IO3- immediately reacts with the iodide ion‚ I- to form iodine‚ I2.
Premium Iodine Chemical reaction Chemical kinetics
it was placed in an ice bath until it was 50° C again. The solution was then heated at 65 ° C for the remainder of the reaction. Over the next 20 minutes‚ the presence of NaOCl in the reaction mixture was ascertained every 5 minutes using a starch-iodide test. If the test was negative‚ additional NaOCl was added to achieve a positive test (0.5 – 1 ml fractions). After 20 minutes‚ the reaction mixture tested positive for NaOCl‚ and NaHSO3 was
Premium Oxygen Chemistry Alcohol
White dropping ray - tripod stand and mesh -stopwatch - Biuret͛s solution - Sodium Hydroxide solution (NaOH) (or Potassium Hydroxide solution) - Hydrochloric Acid (HCl) - Sodium Hydrogencarbonate (NaHCO3) - Iodine Solution(I2) (or Potassium Iodide solution) - Ethanol (C2H5OH) - distilled water (H2O) Test Method Reducing Sugars 2cm3 of solutions A-G were placed into separate‚ labelled test tubes using separate measuring syringes. An equal volume (2cm3) of Benedict͛s solution was
Premium Sodium hydroxide Color Green
| IDENTIFICATION OF SOME MACROMOLECULES | | INTRODUCTION Dehydration-synthesis is a reaction that occurs to form different types of macromolecules. It is a reaction that leaves a macromolecule structure along the lines of developing its own specific function in a living organism. The 4 most common ones are carbohydrates which includes monosaccharides and polysaccharides‚ lipids‚ proteins and nucleic acids (Mack 2012). Scientists identify different types of macromolecules to achieve
Premium Purple Color Green
case of the KBrO3 procedure‚ potassium iodide is added to react with Br2 to form I2. Br2 + 2 I- 2 Br- + I2 In both methods the excess iodine formed is back-titrated with standard sodium thiosulfate. I2 + 2 S2O3-2 2 I- + S4O6-2 Ascorbic acid can undergo air oxidation requiring that the procedure be performed with minimal delay. Reagents: | | starch solution | 1.5 M H2SO4 | | potassium bromide | potassium bromate | | potassium iodide | potassium iodate | POTASSIUM BROMATE
Premium Iodine Titration Potassium
color and was fewer luster. Water: Bubble effect ‚ remained stationary. Size was 4mm x 4mm‚ translucent and more luster than the oil. E. Making iodine in water: potassium iodide (KI)‚ and sodium hypochlorite (bleach‚ NaClO). F. Making iodine in oil: mineral oil‚ water‚ potassium iodide‚ and sodium hypochlorite Initially: H2O in center of oil‚
Premium Scientific method Sodium chloride Water
---> CuSo4 + 5H2O Solute- Solid which is dissolving Solvent- liquid in which the solute dissolves Solution- the solute and solvent mixed together Sodium hydroxide- Soluble Copper Oxide- insoluble Calcium hydroxide- Insoluble Silver iodide- insoluble Aluminium nitrate- soluble Most ionic substances will dissolve in water but covalent substances usually wont dissolve. Solubility of a solute = mass of a solid required to a saturate 100g of water at a particular temperature.
Premium Water Solubility Oxygen
yield. A + B C + D C + E F What is the yield of F? answers 1 | 1.71 x 10-2 nm3 | 2 | 0.860 g carbon dioxide | 3 | 9.99 g iron III chloride | 4 | x = 1 | 5 | 70% lead II oxide | 6 | 7.42 g Zn and 27.64 g zinc iodide | 7 | 79 % yield | 8 | 48% yield
Premium Carbon dioxide Zinc Oxygen
Active Ingredients Iodine 7% Potassium Iodide 5% alcohl 85% Purpose Antiseptic Uses To prevent infection in mior cuts‚ scrapes‚ and burns. Warnings For external use only Ask a doctor if you have: deep or puncture wounds animal bites serious burns. Stop use and consult a doctor if: The condition persists or gets worse‚ or if using for longer than once a week. When using this product: Do not use in the eyes. If contact occurs‚ flush with large amounts
Premium Starch Antiseptic Iodine