When an indicators color changes it shows the presence of an organic compound. The purpose of using distilled water as one of the substances is that it is the control so you can see the differences. Also, in the substances distilled water was mixed in with them. The control group in part C is distilled water. The purpose of washing the test tubes thoroughly is so the chemicals don’t cross contaminate and affect the outcome of another section of the lab.
This colligative property is important in many industries, but is clear to see when using ordinary salt to remove ice from steps or a driveway. The water takes salt into solution, which in turn lowers the freezing point of the water, ensuring that even sub-freezing ambient temperatures do not lead to ice buildup anywhere the salt or ice melt was applied. Experimental Procedure: Before any measurements were taken, equipment was set up and calibrated. Using Microlab’s integrated calibration file the thermistor was calibrated in order to obtain accurate temperature measurements. A graph for the data was also set up with time on the x axis in .5 second intervals and temperature on the y axis.
The Loss and then Retrieval of Copper through Multiple Reactions Lab Partners: Justin Dunn and Alexis Almaguer Experiment #2 Section: 506 Intro: All science occurs within rules. One very important rule is that matter can neither be created nor destroyed and this rule will be expressed and proven in this lab by removing copper and then regaining it through multiple reactions, heating, and stirring. This experiment allows the students to learn the different types of reactions as well as learn new techniques within the laboratory such as vacuum filtration and handling hot glassware, but most importantly proves the law of conservation of mass. Materials and Methods: to begin the experiment a 50 ml beaker, hot plate, plastic funnel, aspirator,
This technique prevents the product to contact other reactants, and leave the heating environment which might cause side reactions. The removal of the product also helps to shift the equilibrium position of the incomplete reaction to the right hand side, and prevents backwards reaction, resulting in an increased yield of products. This experiment also introduces the idea of azeotrope. An azeotrope is a mixture of two or more pure compounds in such a ratio that its composition cannot be changed by simple distillation. This is because when an azeotrope is boiled, the resulting vapour has the same ratio of constituents as the original mixture of liquids.
1.2 Explain how duty of care contributes to the safeguarding or protection of individuals Risk Assessment By ensuring risk assessments are been carried out within a setting before each session. Make sure all equipment and toys are safe and the equipment is age appropriate for the children in care. Assessing the setting and making sure there are no potential hazards like hazard materials being left out or electrical sockets being left uncovered. Ensuring the setting is clean to stop the spread of infection. That food is stored properly to stop cross-infection and the kitchen is always clean to stop the spread of bacteria and germs.
Percent Copper and Formula Weight of a Copper Compound Introduction: In many chemistry problems, you are asked to calculate the percent composition of each element in a compound. In this experiment a variation of this basic calculation will be employed. The amount of copper in a compound will be determined by dissolving the unknown compound in water. The copper ions in solution will be converted to metallic copper by reaction with magnesium metal. To ensure that all of the copper is removed from solution, an excess of magnesium will be used.
2 Understand the principles and steps of the decontamination process. 2.1 The three steps of the decontamination process are: Clean, disinfect and sterilize. Cleaning should be carried out with disinfectant or cleaning agents and staff know beforehand the proper use of each and when to use them. Any sterilizing techniques should be taught to staff and they should be monitored. 2.2 Cleaning agents should be used to prevent infection and to follow any organisational policies and COSHH regulations.
To note the endpoint of the reaction, a pH electrode probe is placed in the reactant. In understanding and finding out the results of the laboratory, it is important to know its components, find the percent composition to see how much acetic acid is in vinegar, and to find the pH solution of vinegar. Experimental Investigation One: First, be sure that the temperature and the pH electrode are set up and are connected to LoggerPro software. Rinse the probe with distilled water after you unscrew the top cap and then dry afterwards. To calibrate the
Proper disposal methods should be effected to ensure the water aquifers around do not get contaminated. 5. After analyzing the arguments for and against fracking, state your position about whether people’s concerns are warranted. Absolutely people’s concerns are warranted, these chemicals in our water supply have cancer causing agents that hinder health. References Else, H. (2012).
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.