Question breakdown in Comparing Two Vinegar Samples (Q21–Q25)
| Question | Response Type | Topic | NYSP12SLS Standard | Action |
|---|---|---|---|---|
| Question 21 | 1-credit Multiple Choice (4 options) | Acids and bases | HS-PS1-11 | Solve in workspace → |
| Question 22 | 1-credit Constructed Response (rubric-scored) | Acids and bases | HS-PS1-11 | Solve in workspace → |
| Question 23 | 1-credit Multiple Choice (4 options) | Acids and bases | HS-PS1-11 | Solve in workspace → |
| Question 24 | 1-credit Constructed Response (rubric-scored) | Acids and bases | HS-PS1-11 | Solve in workspace → |
| Question 25 | 1-credit Multiple Choice (4 options) | Solutions | HS-PS1-10 | Solve in workspace → |
Other clusters in Chemistry Practice Examination · 115
| Questions | Cluster & Topics | Format | Practice |
|---|---|---|---|
| 1–5 | Potassium and Argon in RocksArgon released from heated rock: nuclear vs chemical change, beta decay equations, K and Ca ions, comparing designsNuclear chemistry · Periodic patterns · Engineering design (HS-PS1-8, HS-PS1-1, HS-ETS1-1) | 3 MC, 2 CR | Practice cluster |
| 6–10 | A Lighter Protective HousingMagnesium housings and a rinse liquid: predicting ion charges, metallic conduction, vapor pressure, and water's polarityPeriodic 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 | Air in a Bicycle PumpA bicycle pump compressing air: Boyle's law, the combined gas law, O₂ from peroxide at STP, and specific heatGases · Stoichiometry and conservation · Thermochemistry (HS-PS1-9, HS-PS1-7, HS-PS3-1) | 3 MC, 2 CR | Practice cluster |
| 16–20 | Preparing a Deicing BrineRoad-salt brine in the lab: percent by mass, balancing sodium + chlorine, neutralization stoichiometry, how ions formSolutions · Stoichiometry and conservation · Bonding and formulas (HS-PS1-10, HS-PS1-7, HS-PS1-2) | 3 MC, 2 CR | Practice cluster |
| 26–30 | Cleaning an Exhaust StreamCO oxidation in a model converter: catalyst energy diagrams, temperature and time to endpoint, CO₂ mass, 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 | Hydrogen from Methane and SteamSteam-methane reforming: temperature and Le Châtelier's principle, H₂ mole ratios, Group 14 bond energies, catalystsEquilibrium · 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 | Moving Copper Between ElectrodesCopper plates A and B in CuSO₄ with a power supply: reduction half-reaction, energy conversion, 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 | Moving Heat Through a Sealed PipeA water heat pipe: vapor pressure and boiling point, evaporation, specific heat, g/L concentration, ions in waterIntermolecular 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 | A Plant Room with Adjustable LampsRed and blue LEDs for a plant room: wavelength, frequency and photon energy, mercury spectral lines, photosynthesisElectromagnetic radiation · Photosynthesis · Engineering design (HS-PS4-4, HS-LS1-5, HS-ETS1-2) | 3 MC, 2 CR | Practice cluster |
Frequently asked questions
- How is Comparing Two Vinegar Samples · Chemistry Practice Examination · 115 Chemistry Regents Cluster (Q21–Q25) structured on All Regents?
- Two vinegars titrated with NaOH: pH and hydronium ions, proton donors and acceptors, titration endpoints, dilution. Practice the Comparing Two Vinegar Samples phenomenon cluster (Q21–Q25: 3 MC, 2 CR) from Chemistry Practice Examination · 115 (Physical Science: Chemistry). Covers Acids and bases, Solutions (HS-PS1-11, HS-PS1-10) 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.