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Label the test tubes Carefully pour a little oil over the surface to prevent air from reaching the water.
Put a bung in this tube to prevent any further water from getting in. Teaching notes You could ask students to tabulate which conditions are present or absent in each of the tubes. Tube 1 — water and air Tube 2 — water but no air it is removed during boiling and the oil prevents any extra from dissolving in the water and reaching the nail Tube 3 — water, air and salt Tube 4 — air, no water the calcium chloride removes the water from the air and the bung prevents any extra from entering.
They should see that the nails in tubes 2 and 4 do not rust. The nail in tube 3 rusts the most. From this they should be able to conclude that water and air actually oxygen in the air are essential for rusting. Salt can increase the rate of rusting.
This can lead to a discussion about rust protection and methods which can be used to keep air and water away from the iron such as paint, grease and plastic coating. Very simply, rusting is the reaction of iron with oxygen — but water is an important part of the process too.
This experiment investigates the conditions needed for rusting to occur. This collection of over practical activities demonstrates a wide range of chemical concepts and processes.
Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures.It is the policy of the Department of Justice to encourage self-auditing, self-policing and voluntary disclosure of environmental violations by the regulated community by indicating that these activities are viewed as mitigating factors in the Department's exercise of criminal .
Investigating Factors Related to Retention of. At-risk College Students. factors that contribute to the success of at-risk students, preparing students are required to meet with a tutor once a week, attend weekly meetings with a small peer group, and.
Investigating Factors that Affect the Rate of Reaction of the Decomposition of Hydrogen Peroxide Emilio Lanza Introduction- In this experiment, the rate of reaction, calculated in kPa sec-1, of the decomposition of hydrogen peroxide will be investigated to see how the change in concentration of hydrogen peroxide and the change in temperature.
Questionnaire for Investigating Critical Success Factors (CSFs) of Enterprise Resource Planning (ERP) in Nordic and Baltic Small and Medium-Sized Enterprises (SMEs). Business Ethics as a Required Course: Investigating the Factors Impacting the Decision to Require Ethics in the Undergraduate Business Core Curriculum.
We assess internal as well as external factors that may influence whether AACSB-accredited business schools choose to require a business ethics course in their undergraduate core curricula. Using data from universities, we find evidence of a relationship between the characteristics of a business school's leadership and the .