GACE Chemistry (712) case studies
GACE Chemistry (712) · Put your knowledge to work in context.
GACE Chemistry (712) is the Georgia content-area assessment used by the Georgia Professional Standards Commission and the Educational Testing Service for candidates seeking certification to teach chemistry in Georgia secondary schools. It is typically taken by preservice teachers completing an educator-preparation program, by certified teachers adding a chemistry field, and by out-of-state or alternatively prepared candidates who need Georgia certification. The test measures the chemistry knowledge and habits of mind a classroom teacher must have: designing and interpreting investigations, modeling atomic and molecular structure, applying stoichiometry and thermodynamics, reasoning about solutions, kinetics, and equilibrium, and connecting organic, biochemical, and environmental chemistry to real systems. Expect a combination of multiple-choice items and at least one constructed-response task, with content spread across all six domains rather than concentrated in one. The GACE Chemistry (712) case studies are 5 cases and about 3,041 words.
1Catalase or Temperature? A Reaction-Rate Claim Under Review
During a unit on reaction rates, a student compares the decomposition of 3.0% H2O2 with and without 0.50 g of MnO2. She uses a 50.0 mL gas syringe and records the volume of O2 every 10 s.
644 words, about 3 min2A Thyroid-Therapy Vial That Does Not Decay as Labeled
A hospital's nuclear medicine department receives a vial labeled I-131 (t1/2 = 8.02 d) for thyroid therapy. The supplier's certificate states a calibration activity of 3.70 GBq in 2.0 mL at 08:00 six days ago.
562 words, about 3 min3Two Nitrophenol Solids: Intramolecular vs Intermolecular Hydrogen Bonding
A student synthesizes nitrophenols by nitrating phenol and obtains two solids. Recrystallization gives Sample A, mp 45–46 °C, and Sample B, mp 113–115 °C.
538 words, about 3 min4Calorimetry with a Limiting Reagent and an Overstated Uncertainty
A general chemistry student is assigned to determine the enthalpy of neutralization of HCl(aq) with NaOH(aq). She mixes 50.0 mL of 1.00 M HCl with 50.0 mL of 1.00 M NaOH in a coffee-cup calorimeter.
654 words, about 3 min5Pond Eutrophication: Phosphate Limitation and an Alum Dose Decision
A citizen-science group monitors a 2.0 × 10^5 L farm pond. Upstream water: 0.80 mg/L NO3−-N, 0.05 mg/L PO4^3−-P, DO 8.1 mg/L.
643 words, about 3 min