teachers and science demonstrators are specially trained in the hazards of using these chemicals. * Hydrogen peroxide (30%) - This is ten times stronger than the normal hydrogen peroxide you can find at the store * Sodium iodide solution‚ 2 M or * Potassium iodide solution‚ 2 M * Liquid soap * Food coloring * Graduated cylinder (500 mL) * Safety glasses * Rubber gloves for clean-up * Experiment * Video * Related Experiments * Reviews Magic Spheres - Science
Premium Water Oxygen Electric charge
Thermal Physics Why a Gas Exerts a Pressure Consider the molecules of a gas moving at random in a container‚ as shown below. The molecules are continually colliding with each other and with the walls of the container. (On the diagram‚ only a few paths of molecules have been drawn because...it’s a bit tedious drawing them!) It is assumed that all collisions are elastic. (Consider what would happen if the collisions were not elastic.) When a molecule collides with the wall‚ a change of
Premium Potassium permanganate Manganese Potassium
Pellagra is caused by the deficiency of niacin and/or tryptophan in our diet. Niacin also called vitamins B-3 is a water-soluble vitamin‚ it means it is not stored in the body and they are excreted from the body through urine or feces. That is the reason why the body need regular supply of this vitamins in our diet. Its main function is to help the cellular metabolic pathway to convert food to energy. Niacin is found in poultry‚ tuna and other fish‚ enriched bread and cereals‚ beef‚ and peanuts
Premium Vitamin Vitamin D Immune system
Osmosis is the diffusion of a solvent across a selectively permeable membrane that occurs in response to differences in solute concentrations (Allen and Harper 2014).Osmosis can fall under the category of passive transport which does not require energy. With osmosis being a type of diffusion it is viewed as molecules moving from a high concentration to a low concentration. To further explain if there is a low water concentration‚ high amounts of solutes will be present. Water will most likely move
Premium Osmosis Concentration Water
tarnishing. Silver coins also used to be used in the ancient world but has been stoped today. Silver is also used in the making of jewellery‚ cutlery‚ and decorative. Silver is also in batteries. Silver Nitrate (agNO3) is used in photo films. Silver Iodide (AgI) is used to see clouds to predict
Premium Silver
Title Laboratory Techniques and Measurements Purpose The purpose of this experiment is to determine mass‚ length‚ temperature‚ volume‚ and density of objects and liquids using common measuring devices and algebraic formulas. The metric system‚ the most common set of measurements used in science‚ which includes meters‚ liters‚ Celsius‚ and grams will be used. Procedure The following items were used within the experiment: (1) Metric ruler with centimeter (cm) and millimeter (mm)‚ (1)
Premium Orders of magnitude Water Base
H. pylori were centrifuged and washed by PBS. Then‚ bacterial sediments were stained with propidium iodide as a fluorescent dye (PI; Sigma‚ USA) and incubated 30 min at 4°C. Afterwards‚ cell suspension analyzed by flow cytometer (FACS Calibur‚ Becton Dickinson). PI is easily able to distinguish populations of dead cells from viable ones. Meanwhile‚ impaired cell membrane let more propidium iodide to enter through the cell; fluorescent dye are not absorbed by viable cell due to its
Premium Immune system Cancer Infection
Applications of Le Châtelier’s Principle (September 11 - 15‚ 2014) **The purpose of this experiment was to visually observe the effects of how changing certain aspects of the reaction affected the observed equilibrium. PROCEDURE: Introductory activity Part A: Effect of Concentration: Two different temperature water baths were created‚ one at 65-70oC‚ the other ice‚ and set aside for Part B. 20 mL of potassium thiocyanate solution were poured into a petri dish. The initial color and all subsequent
Premium Chemistry Chemical reaction Water
There are three reactions in the iodine clock reaction. The first reaction is IO3-(aq) + 3 HSO3-3 SO4-(aq) + I-(aq)+ 3 H+(aq)‚ where the iodate ions become iodide ions1. The second reaction is 6 H+(aq) +IO3-(aq) + 5 I-(aq) 3 I2(aq) + 3 H2O(l) where the iodate ions become molecular iodine2. The third reaction involves molecular iodine becoming a dark blue starch;I2(aq) + starch blue-black complex3. These three reactions react in a sequence. In any reaction the concentration is exponentially related
Premium Chemical reaction Chemistry Iodine
Analysis of Alcohols‚ Aldehydes and Ketones Karl Wayne Mancao‚ Raphaell Mordeno‚ Andres Pastrana III*‚ and Shannen Peñaverde Department of Biology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract The proponents have done several tests for identifying alcohols‚ aldehydes and ketones. These tests are Dichromate test‚ Tollens test‚ Lucas test‚ DNPH test and Iodoform test. Three samples got positive result in dichromate test and one in Tollens test. Lucas test got one sample that has
Premium Alcohol Oxygen Aldehyde