Question breakdown in Recovering Salts from Lake Brine (Q16–Q20)
| Question | Response Type | Topic | NYSP12SLS Standard | Action |
|---|---|---|---|---|
| Question 16 | 1-credit Multiple Choice (4 options) | Solutions | HS-PS1-10 | Solve in workspace → |
| Question 17 | 1-credit Constructed Response (rubric-scored) | Solutions | HS-PS1-10 | Solve in workspace → |
| Question 18 | 1-credit Multiple Choice (4 options) | Stoichiometry and conservation | HS-PS1-7 | Solve in workspace → |
| Question 19 | 1-credit Constructed Response (rubric-scored) | Stoichiometry and conservation | HS-PS1-7 | Solve in workspace → |
| Question 20 | 1-credit Multiple Choice (4 options) | Bonding and formulas | HS-PS1-2 | Solve in workspace → |
Other clusters in Chemistry Practice Examination · 104
| Questions | Cluster & Topics | Format | Practice |
|---|---|---|---|
| 1–5 | Tritium Exit SignsTritium exit signs and their plastic cases: nuclear decay equations, valence electrons, and polymer structureMaterials and structure · Nuclear chemistry · Periodic patterns · Engineering design (HS-PS2-6, HS-PS1-8, HS-PS1-1, HS-ETS1-1) | 3 MC, 2 CR | Practice cluster |
| 6–10 | Borosilicate Glass in the LaboratoryGlassware that survives heating: Si vs O trends, network covalent solids, and intermolecular forces from boiling dataPeriodic patterns · Bonding and formulas · Materials and structure · Intermolecular forces · Polarity and molecular structure (HS-PS1-1, HS-PS1-2, HS-PS2-6, HS-PS1-3, HS-PS3-5) | 3 MC, 2 CR | Practice cluster |
| 11–15 | Gas in a Sealed, Flexible Bag Rising Through WaterA lift bag rising through water: Boyle's law, the combined gas law, and O₂ from peroxide in mass and heat problemsGases · Stoichiometry and conservation · Thermochemistry (HS-PS1-9, HS-PS1-7, HS-PS3-1) | 3 MC, 2 CR | Practice cluster |
| 21–25 | Acid Formation During Yogurt FermentationTracking pH as milk becomes yogurt: hydronium ion concentration, acids and bases, indicators, and freezing pointAcids and bases · Solutions (HS-PS1-11, HS-PS1-10) | 3 MC, 2 CR | Practice cluster |
| 26–30 | Enzymes and Peroxide Bleach in Laundry ProductsProtease detergents and peroxide bleach: potential energy diagrams, catalysts and temperature in rate, and specific heatThermochemistry · Reaction rates · Stoichiometry and conservation (HS-PS1-4, HS-PS1-5, HS-PS1-7, HS-PS3-1) | 3 MC, 2 CR | Practice cluster |
| 31–35 | Heating Limestone to Make LimeLimestone in a sealed model and crucible: Le Châtelier's principle, CO₂ mass, Group 2 trends, flame temperature vs rateEquilibrium · Stoichiometry and conservation · Periodic patterns · Engineering design · Reaction rates (HS-PS1-6, HS-PS1-7, HS-PS1-1, HS-ETS1-3, HS-PS1-5) | 3 MC, 2 CR | Practice cluster |
| 36–40 | Purifying Copper by ElectrolysisMoving copper from impure to pure strips: half-reactions, charge carriers in wire and solution, and oxidation numbersOxidation and reduction · Materials and structure · Polarity and molecular structure (HS-PS1-12, HS-PS2-6, HS-PS3-5) | 3 MC, 2 CR | Practice cluster |
| 41–45 | Recharging a Reusable Heat PackCrystallizing and recharging a heat pack: particle attractions, heat of fusion, specific heat, and solubilityIntermolecular forces · Thermochemistry · Solutions · Polarity and molecular structure (HS-PS1-3, HS-PS3-1, HS-PS1-10, HS-PS3-5) | 3 MC, 2 CR | Practice cluster |
| 46–50 | Light for an Orbital GardenRed, blue, and green LEDs for space lettuce: photon frequency and energy, why leaves look dark, and UV safetyElectromagnetic radiation · Photosynthesis · Engineering design (HS-PS4-4, HS-LS1-5, HS-ETS1-2) | 3 MC, 2 CR | Practice cluster |
Frequently asked questions
- How is Recovering Salts from Lake Brine · Chemistry Practice Examination · 104 Chemistry Regents Cluster (Q16–Q20) structured on All Regents?
- Evaporating a three-salt model brine: molarity, percent by mass, and stoichiometry of a magnesium precipitate. Practice the Recovering Salts from Lake Brine phenomenon cluster (Q16–Q20: 3 MC, 2 CR) from Chemistry Practice Examination · 104 (Physical Science: Chemistry). Covers Solutions, Stoichiometry and conservation, Bonding and formulas (HS-PS1-10, HS-PS1-7, HS-PS1-2) with the 2025 Reference Tables and scoring guide. Every question is worth 1 raw credit and pairs with the 2025 Edition Reference Tables, automatic multiple-choice key checking, and step-by-step constructed-response scoring guidance.
- Can I practice one phenomenon cluster at a time or sit the full exam?
- Yes. In the All Regents workspace you can launch any individual 4–6 question cluster in Learn mode (with strategy prompts) or sit the complete examination in Exam mode, then review every answer against the official-style scoring guide.