Possible experimental errors include not properly removing all the iron/salt/benzoic acid from sand. Residue in beaker and cups not completely removed for accurate mass weight. Another error could have been not properly drying the benzoic acid filter paper or sand mixture before weighing. Questions: A. How did your proposed procedures or flow charts at the beginning of this experiment compare to the actual procedures of this lab exercise?
(Waste Online 1999) Household waste is domestic items such as paper, flowers, plastic bottles which are not contaminated so are not at risk of spreading infection. Therefore household waste can be put into a black bin bag. These black bin bags are disposed of in landfill sites. (Cleanliness Champions 2008) Unit 8 tate three key measures to be taken to ensure safe handling of food 1. protecting food from the risk of contamination 2. preventing any bacteria present from multiplying 3. destroying harmful bacteria by thorough cooking (Cleanliness Champions Website) Three measures that can be taken to ensure safe food handling are ensuring that the food is protected from risk of contamination such as pest or germs getting on the food, not allowing any bacteria that may already be on the food from multiplying by keeping it at the right temperature and also by heating the food correctly and thoroughly cooking to destroy any bacteria Unit 9 One way of preventing infection within a care setting is to use aseptic technique when inserting an invasive
Though they are purified or processed, they were at one point marine, plant, animal, or microbial. The chemicals are used in small amounts that have to meet a set standard for human consumption. The lab equipment is used to do anything from keep a food cooking at a specific temperature like a water bath, cool foods quickly like with liquid nitrogen, or extract flavors with evaporation. Some may also argue that because it is not eaten on a regular basis it shouldn’t affect your health in any major way. The point of molecular gastronomy isn’t to be a
Infectious waste would include humans who have diarrhoea and this type of waste would have the risk of cross-contamination. Non-infectious waste would include household waste such as paper which carries a low level of risk with the potential of paper cuts. 3.2 To dispose of the different types of waste safely and without risk to others is the use of colour coding. This indicates the type of waste contained in the bags or containers. For example non-infectious waste in a nursing home, such as human faeces is disposed of in yellow clinical bag and collected usually by an outside company who will incinerate the waste.
Developed TLC plate by placing plate in chamber not contacting filter paper.7. Removed plate from chamber when solvent front was 1 to 2 cm from top of plate.8. marked solvent front with pencil line & set on paper towel to dry.9. Marked position of compounds on plate using a UV lamp10.Calculated Rf values for each spot11. determined results were unsatisfactory to how experiment was supposed to turn out.Part B1.
Date................... Assessor Name.................................... Date.................. IV Name............................................... Date.................. UNIT NO. | LEARNING OUTCOME | Question | UNIT NO. | LEARNING OUTCOME | 264 | 2.2, 3.1, 6.4 | What are the main points of the policies and procedures for hand washing?Expose forearms – Bare below the elbowSingle band ringNo bracelets or watchesNails clean and of reasonable lengthNo false nails or nail polishWash with soap and water to remove dirt and micro organisms, or apply alcohol rubWash hands when visibly soiled, contaminated with blood or bodily fluids, after using the toilet, before procedures and before eating.
Iron (II) Sulfate is also harmful if ingested, and could cause death. It can be used as a nutrient and agriculturally. Copper (II) Sulfate Pentahydrate is used in agriculture as a pesticide, germicide, feed additive and soil additive. (http://chemicals.etacude.com/c/copper_sulfate2.php) Mole- a chemical mass unit, defined to be 6.022 x 1023 molecules, atoms, or some other unit Molar Mass- the mass of one mole of a substance Balanced Equation- an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge are the same for both the reactants and the products Oxidation Reduction Reaction- a half-reaction in which a chemical species decreases its oxidation number, usually by gaining electrons. Single Replacement Reaction- a reaction is characterized by one element being replaced from a compound by another element.
These spaces are designed to prevent the product being produced from coming into contact with the environment surrounding the product. These spaces need less cleaning than open spaces. Open Processing Spaces are designed in a way that the product being produced can come into contact with the surrounding environment but these laboratory spaces must be kept sterile and cleaned regularly to eliminate any contaminants that may cause harm to the product. Main
Some scientists say no. Soap comprises of an acid – fatty acids and triglycerides, and a base – sodium hydroxide and has two main functions: to decrease the surface tension and to bind together dirt, oil and bacteria; it contains hydrophilic molecules which allow hydrophobic substances such as dirt and
[1] * heat source, such as a hot plate with a bath, and ideally with a magnetic stirrer. * distilling flask, typically a round-bottom flask * receiving flask, often also a round-bottom flask * fractionating column * distillation head * thermometer and adapter if needed * condenser, such as a Liebig condenser, Graham condenser or Allihn condenser * vacuum adapter (not used in image to the right) * boiling chips, also known as anti-bumping granules * Standard laboratory glassware with ground glass joints, e.g. quickfit apparatus. [edit] Discussion As an example, consider the distillation of a mixture of water and ethanol. Ethanol boils at 78.4 °C while water boils at 100 °C.