08 Analytical Laboratory

Event 8: Analytical Laboratory
This event is limited to the first 24 entries.
 
2020 Topic: Calorimetry
  Background:
We put various salts on the roads and in our soils to do a variety of things. We use salts to prevent roads from freezing causing dangerous driving conditions and we use them as herbicidal treatments for lawns to reduce weed growth. These salts dissolve over time and form solutions that seep into water supplies and soil systems. The salts linger in the environment causing damage to wildlife and corrosion to our property. What about these salts causes them to be destructive, what happens when they dissolve, and should we rethink our liberal use of them?
 
Objective:
Build your own basic calorimeter (no kits or commercial versions allowed) and design an experimental protocol that you can use to determine the heat of solution and the identity of an unknown salt that is commonly used for de-icing.
 
Materials Provided by NJIT on the Day of the Event:
  • ~ 1.0g sample of the unknown salt
  • analytical balance
  • hoods with electrical outlets
 Materials & Methods Brought by Team to the Competition:
  • Bring whatever you need to perform the experiment. Make sure you have enough deionized water.
  • Calorimeter
  • Pre-approved step-by-step description of the methods they intend to use to address the objective of this experiment (method must be submitted by April 1, 2020).
  • Appropriate Personal Protective Equipment (PPE)
 INSTRUCTORS NOTES ON SPECIAL SAFETY CONSIDERATIONS:
  • Laboratory should be supervised by the instructor/coach at all times.
  • Review all procedures for safety concerns.
  • Teams will be permitted to perform only their pre-approved procedure with safety protocols.
  • Safety protocol must be addressed in the team's procedure submitted for evaluation prior to event.
  • Teams must practice their procedure prior to event day. Judges reserve the right to dismiss unprepared teams the day of the event.
Required Activity Prior to the Event:
  • Research, design and execute a procedure for determining the heat of solution for various salts.
  • Construct a calorimeter.
  • Test your procedure and record at least 4 determinations of heat of solution each for two de-icing salts of your choice.
  • You must practice your procedure. Judges may disqualify entrants who are not confident about their procedure, and thus pose a safety risk.  Review, be familiar with and be prepared to follow all safety guidelines associated with your chosen method.
  • Submit step-by-step description of the methods and safety protocol and recorded tests and calculations to the Director of the NJCO by April 1st, 2020 for safety review.
  • Research, write, and submit a paper describing the effects of deicers on the environment. You must pick a focus area (i.e. soil, water supply, plant life, animal life, property degradation, etc.) for your research. Your paper must have a minimum of 3 quality primary sources. Your paper should be 2 to 4 pages in text (excluding bibliography, appendices, or images).
  On the Day of the event:
  • Follow your team's laboratory procedure to collect and record data for a minimum of two trials.
  • Final product will be weighed by a neutral 3rd party on provided analytical balances.
  • Clean up
  Time Limit:   75 minutes   Judging
  • Written submission of procedure and methods (including safety) 20%
  • Prior data and calculations based on procedure 15 %
  • Research paper on environmental impact and sources 20%
  • Schematic, design, and quality of calorimeter 15 %
  • Accuracy of heat of reaction and determination of unknown on day of competition 20%
  • Carry out procedure within time limit (exceeding time limit will lead to points being docked) 10%
Notes:
  • In the event of a tie, the team that completes this session in the shortest period of time will win the tie.
  • Teams must clean up and remove all materials that they bring to this event and return them to their own schools.
    ALL PARTICIPANTS MUST BRING (APPROVED) GOGGLES, GLOVES AND APRON OR LAB COAT, AND USE SAFETY EQUIPMENT AT ALL TIMES DURING THE COMPETITION.  STUDENTS MUST ADHERE TO BOTH GENERAL LAB SAFETY PROTOCOLS AND THOSE SPECIFIC TO THEIR CHOSEN PROCEDURE.