Lab 5: Precipitate Patterns October 31st, 2013 Partners: Muhammad Saeed, Kristian Palmer and Kyle Poirier By: Rauman Tuan-Kichil For: Mr. Fontaine Investigation: Wastewater from metal manufacturing processes often contains toxic cations. These ions must be removed before the water can be released into the environment. Many of these ions can be removed using precipitation reactions. For example, recycled car batteries contain toxic lead cations, Pb 2+. These can be removed by adding a solution of potassium iodide, KI.
2.2 Cleaning agents should be used to prevent infection and to follow any organisational policies and COSHH regulations. Cleaning agents include soap-based detergents and can be used for floors, walls, fixtures and fittings and persons. 2.3 Disinfecting agents generally include chemical detergents that are antibacterial or antiseptic and are used for the disinfections
For the difference in quality between tap water and bottled water, I believe that the bottled water, in this case Dasani and Fiji, will be a lot purer and not have as many contaminants than the municipal tap water. Abstract In this experiment the quality and contamination level of groundwater and bottled water were tested. The first thing I observed was the effects pollutants have on water. The pollutants used were bleach, cooking oil, and vinegar. I predict that bleach will have the most negative effect on the water, particularly when it comes to the hazardous effect it can produce if someone were to consume it.
Water Quality and Contamination Report 1 Schrita Scott Water Quality and Contamination SCI207: Dependence of Man on the Environment Instructor Carrie Myers February 25, 2014 Water Quality and Contamination Report 2 Water Quality and Contamination Introduction: When it comes to water quality and contamination, first and foremost ground water is present below the surface in porous rocks and is prone to contamination by natural and human activities. Large amounts of chemicals like soap, detergents, fertilizers, pesticides, and pharmaceutical are often times discharged into fresh water aquifers almost daily. These contaminants leak into the soil in which it then dissolves into ground water. Different contaminants have different rates of solubility and degradation once they reach the underground water table, either by simple flow or by the downward movement of rain water. The ground water may become contaminated with both organic and inorganic substances which may include heavy metals like Cadmium, Chromium and Nickel, etc.
The extended holding of the waste fluid in the pits could lead to their seepage into the ground, especially if the pits are not lined with plastic. This contaminates the water sources around. In addition, any overflows, for instance caused by heavy rains, allows the fluid to contaminate water in the sources. Large volumes of fluid is required (thousands of gallons of water is used per well) and its disposal is an issue too (Schmidt, 2011). Proper disposal methods should be effected to ensure the water aquifers around do not get contaminated.
Therefore the alkalinity of water samples is being calculated. In the second approach, the two volume readings for the respective amounts of sulfuric acid used are being determined an indicator based method. Congo red and bromocresol green are being used as the indicators. Procedure (Outline provided as pre-lab): A. The pH meter was calibrated using standard pH solutions provided.
al.). Some pollutants – for instance, polycyclic aromatic hydrocarbons – can lead to life-threatening diseases in humans and wildlife, such as cancer (Harvey). Scientists use many different methods to remove these pollutants from water supplies; one of those methods is the utilization of adsorption onto a porous substance, normally charcoal. Due to numerous circumstances, scientists have begun searching for alternatives to charcoal, one of them being Bentonite clay. However, Bentonite clay cannot be easily removed from the water, so in this project the students were instructed to modify the clay to make it magnetic and then compare its effectiveness in absorbing a model PAH against charcoal.
Calculate the value of Ke for this system. 2 H2S (g) === 2 H2 (g) + S2 (g) [1.1(10-4] 7. At a given temperature, the following system has an equilibrium constant, Ke, of 0.27. C(g) + B(g) === 2 E(g) The system was established by placing 8.00 moles of C and 5.0 moles of B in a 4.0 L vessel. Calculate the concentration of all substances at equilibrium.
When working in a microbiology lab, it is important to contain spills and discard materials properly. Describe how a spill should be cleaned up safely in a microbiology lab. (3 pts) Alert people in immediate area. Put on protective equipment. Cover area with disinfectant soaked-paper towels or with dry disinfectant.