Chem Lab- Stiochemistry

a. The competition will consist of a series of tasks focused in the areas of equilibrium and chemical reactions/ stoichiometry. These tasks could include hands-on activities, questions on listed topics, interpretation of data (e.g., graphs, diagrams, tables), or observation of an established and running experiment. b. Teams may be asked to collect data using a probeware set-up demonstrated by the Supervisors). Following a demonstration of the sensors/probes, participants may be given data sets to interpret c. Nomenclature, formula writing, & stochiometry (mole conversions & percentage yield) are essential tools of chemistry & may be included in the event. Participants are expected to know the symbols & charges for: nitrate, carbonate, phosphate, acetate, sulfate, ammonium, bicarbonate, & hydroxide. Participants should know how to use the form of anion (one less oxygen than the "ate" form). With a periodic table, participants should be able to obtain charges for monatomic ions (e.g., Na*, S*).

Notes on Competition Tasks in Chemistry

1. Task Areas: The competition will focus on key areas of chemistry, including:

   • Equilibrium

   • Chemical Reactions

   • Stoichiometry

2. Types of Activities: Participants can expect the following tasks:

   • Hands-on activities requiring practical application of concepts.

   • Questions on relevant chemistry topics.

   • Data interpretation from various formats such as graphs, diagrams, and tables.

   • Observation of running experiments to understand real-world applications.

3. Data Collection: Teams may collect data using probeware. This involves:

   • Demonstrations by Supervisors on operating sensors and probes.

   • Interpretation of provided data sets following hands-on demonstrations.

4. Nomenclature and Stoichiometry: Essential tools in chemistry that will be included:

   • Knowledge of chemical nomenclature and the ability to write chemical formulas.

   • Understanding stoichiometry concepts such as mole conversions and percentage yield.

   • Familiarity with symbols and charges for common ions, including:

     • Nitrate (NO3-)

     • Carbonate (CO3^2-)

     • Phosphate (PO4^3-)

     • Acetate (C2H3O2-)

     • Sulfate (SO4^2-)

     • Ammonium (NH4+)

     • Bicarbonate (HCO3-)

     • Hydroxide (OH-)

   • Awareness of naming conventions, specifically the form of anions based on oxygen content (e.g., “ite” for one less oxygen than “ate”).

5. Use of Periodic Table: Participants are expected to utilize the periodic table to:

   • Obtain charges for monatomic ions, such as sodium (Na+) and sulfide (S2-).