Thursday, March 19, 2020

200 FOUNDATIONS FOR GENERAL EDUCATION AND PROFESSIONAL SUCCESS Ess

GEN/200 FOUNDATIONS FOR GENERAL EDUCATION AND PROFESSIONAL SUCCESS Ess LEARNING TEAM CHARTER TEAM X Course TitleGEN/200 FOUNDATIONS FOR GENERAL EDUCATION AND PROFESSIONAL SUCCESS Team Ground Rules and Guidelines What are the general expectations for all members of the team? Be helpful.(Nasa) Complete all assignments, and have them turned in on time.( Joe) Return your assignment on time NO DELAYS ( Tracy) My expectations for time management and involvement would be to have the group discuss somewhat of what their schedule is and when would be a good time to meet as a group. We would also need to establish a good way for all of us to communicate whether it be via email, chat, or even group Skype. We will need to make sure that we all have the time to meet and discuss our assignments (Reeuna) Expectations for Time Management and Involvement (Participation, communication with the team, accessibility, etc.) Get it done because are all effected if you dont (Nasa) All team members participate and communicate with each other, let others in group know there schedule and times they will be available (Joe) Communication is the key (Tracy) Everyone will have their part of the assignment to complete in a timely manner. The work will be evenly spread among the group so that no one will feel as if they are doing more than the other. The communication strategy will be a phone call or email to each member to see how they are progressing in their part of the assignment and to remind them that we have a deadline to meet as a team. If there is any conflict within the team we just make sure to make our team members realize that we are all responsible for the group assignment and we all are going to receive the same grade. We also encourage our members to put aside any issues that they might have and focus on just the assignment (Reeuna) Ensuring Fair and Even Contribution and Collaboration What strategy will you use to ensure that all team members are contributing and collaborating appropriately? Describe the communication strategy you will use if a team member is not contributing and collaborating effectively. How will the team manage conflicts between team members? I will call you, I will e-mail you I will bug you if that is what it takes to gets things done I am good at it.(Nasa) Learn new ways as we move along. If this is the first time in a learning team, use this to make the future experiences better (Joe) I will try to contact all the team member the best was possible but if they fail to complete their assignment then thats there grade and not mine. (Tracy) To make sure that everyone knows one another schedule and have their correct contact information so that are assignments are on time and submitted correctly also an assignment that everyone agrees on (Reeuna) Special Considerations What do you, as a team, agree will make this team experience different from past team experiences? I will be open mind to all new ideas that can benefit everyone.

Monday, March 2, 2020

How to Properly Clean Laboratory Glassware

How to Properly Clean Laboratory Glassware Cleaning laboratory glassware isnt as simple as washing the dishes. Heres how to wash your glassware so you wont ruin your chemical solution or laboratory experiment. The Basics Its generally easier to clean glassware if you do it right away. When a detergent is used, its usually one designed for lab glassware, such as Liquinox  or Alconox. These detergents are preferable to any dishwashing detergent that might be used on dishes at home. Usually, detergent and tap water are neither required nor desirable. You can rinse the glassware with the proper solvent, then finish up with a couple of rinses with distilled water, followed by final rinses with deionized water. Washing Out Common Chemicals Water Soluble Solutions  (e.g., sodium chloride or sucrose solutions): Rinse 3-4 times with deionized water, then put the glassware away.Water Insoluble Solutions  (e.g., solutions in hexane or chloroform): Rinse 2-3 times with ethanol or acetone, rinse 3-4 times with deionized water, then put the glassware away. In some situations, other solvents need to be used for the initial rinse.Strong Acids  (e.g., concentrated HCl or H2SO4): Under the fume hood, carefully rinse the glassware with copious volumes of tap water. Rinse 3-4 times with deionized water, then put the glassware away.Strong Bases  (e.g., 6M NaOH or concentrated NH4OH): Under the fume hood, carefully rinse the glassware with copious volumes of tap water. Rinse 3-4 times with deionized water, then put the glassware away.Weak Acids  (e.g., acetic acid solutions or dilutions of strong acids such as 0.1M or 1M HCl or H2SO4): Rinse 3-4 times with deionized water before putting the glassware away.Weak Bases  (e.g. , 0.1M and 1M NaOH and NH4OH): Rinse thoroughly with tap water to remove the base, then rinse 3-4 times with deionized water before putting the glassware away. Washing Special Glassware Glassware Used for Organic Chemistry Rinse the glassware with the appropriate solvent. Use deionized water for water-soluble contents. Use ethanol for ethanol-soluble contents, followed by rinses in deionized water. Rinse with other solvents as needed, followed by ethanol, and, finally, deionized water. If the glassware requires scrubbing, scrub with a brush using hot soapy water, rinse thoroughly with tap water, followed by rinses with deionized water. Burets Wash with hot soapy water, rinse thoroughly with tap water, then rinse 3-4 times with deionized water. Be sure the final rinses sheet off of the glass. Burets need to be thoroughly clean to be used for quantitative labwork. Pipets and Volumetric Flasks In some cases, you may need to soak the glassware overnight in soapy water. Clean pipets and volumetric flasks using warm soapy water. The glassware may require scrubbing with a brush. Rinse with tap water followed by 3-4 rinses with deionized water. Drying or Not Drying It is inadvisable to dry glassware with a paper towel or forced air since this can introduce fibers or impurities that can contaminate the solution. Normally you can allow glassware to air dry on the shelf. Otherwise, if you are adding water to the glassware, it is fine to leave it wet (unless it will affect the concentration of the final solution.) If the solvent will be ether, you can rinse the glassware with ethanol or acetone to remove the water, then rinse with the final solution to remove the alcohol or acetone. Rinsing with Reagent ​If water will affect the concentration of the final solution, triple rinse the glassware with the solution. Drying Glassware If glassware is to be used immediately after washing and must be dry, rinse it 2-3 times with acetone. This will remove any water and will evaporate quickly. While its not a great idea to blow air into glassware to dry it, sometimes you can apply a vacuum to evaporate the solvent. Additional Tips Remove stoppers and stopcocks when they are not in use. Otherwise, they may freeze in place.You can degrease ground glass joints by wiping them with a lint-free towel soaked with ether or acetone. Wear gloves and avoid breathing the fumes.The deionized water rinse should form a smooth sheet when poured through clean glassware. If this sheeting action is not seen, more aggressive cleaning methods may be needed.