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100+ Free AEPA Chemistry NT306 Practice Questions

Pass your Arizona Educator Proficiency Assessments Chemistry (NT306) exam on the first try — instant access, no signup required.

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Key Facts: AEPA Chemistry NT306 Exam

NT306

Current AEPA Code

AEPA tests list

150

Multiple-Choice Questions

AEPA Chemistry NT306 test page

3h 45m

Testing Time

AEPA Chemistry NT306 test page

220

Passing Score

AEPA Chemistry NT306 test page

$119

Test Fee

AEPA Chemistry NT306 test page

18 / 18 / 23 / 23 / 18

Official Domain Weights

NES Profile: Chemistry (306)

AEPA Chemistry is currently listed by AEPA as test code NT306. The official Chemistry test page lists a 150-question multiple-choice computer-based or online-proctored assessment, a posted fee of $119, a passing score of 220, and 3 hours and 45 minutes of testing time within a 4-hour CBT appointment. The official NES Chemistry profile weights the test as Nature of Science 18%, Matter and Atomic Structure 18%, Energy and Chemical Bonding 23%, Chemical Reactions 23%, and Stoichiometry and Solutions 18%. This free 100-question bank mirrors those official weights with original practice items and explanations.

Sample AEPA Chemistry NT306 Practice Questions

Try these sample questions to test your AEPA Chemistry NT306 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A chemistry teacher tests whether temperature affects the rate at which magnesium reacts with hydrochloric acid. Which variable should be deliberately changed between trials?
A.The mass of magnesium used
B.The concentration of hydrochloric acid
C.The temperature of the acid solution
D.The method used to collect hydrogen gas
Explanation: The independent variable is the factor intentionally changed to test its effect. If the question is about temperature, the solution temperature should be varied while other conditions remain controlled.
2Which laboratory instrument is most appropriate for measuring the mass of a dry solid reagent before preparing a solution?
A.Volumetric flask
B.Analytical balance
C.Buret
D.Thermometer
Explanation: An analytical balance measures mass with high precision, which is needed when weighing a reagent. Volumetric glassware measures liquid volume, not mass.
3When diluting concentrated sulfuric acid, which procedure best follows standard laboratory safety practice?
A.Add water slowly to the concentrated acid while stirring
B.Add acid slowly to water while stirring
C.Mix equal volumes of acid and water in a sealed container
D.Heat the acid first so the dilution occurs faster
Explanation: Acid should be added slowly to water because dilution is strongly exothermic and the larger water volume absorbs heat more safely. Adding water to concentrated acid can cause localized boiling and splattering.
4Which statement best reflects the evidential basis of a scientific claim?
A.A claim is accepted when it is stated by a popular source.
B.A claim is strongest when it is consistent with reproducible data from well-designed investigations.
C.A claim becomes scientific when it cannot be tested directly or indirectly.
D.A claim is valid when it agrees with the researcher's original hypothesis.
Explanation: Scientific claims are evaluated by the quality and reproducibility of supporting evidence. Well-designed investigations, transparent methods, and repeated results make a claim more defensible.
5A graduated cylinder is marked every 1 mL. Which recorded volume shows the appropriate level of precision for a careful reading?
A.24 mL
B.24.3 mL
C.24.317 mL
D.24.3170 mL
Explanation: A reading from analog glassware is typically estimated one digit beyond the smallest marked division. With 1 mL markings, reporting to the nearest 0.1 mL is appropriate.
6For a graph showing how reaction rate changes with temperature, where should temperature normally be placed?
A.On the y-axis, because it is the measured response
B.On the x-axis, because it is the independent variable
C.In the title only, because variables should not appear on axes
D.On both axes, because both variables must be controlled
Explanation: The independent variable is usually placed on the x-axis, and the dependent variable is placed on the y-axis. In this case, temperature is changed to observe its effect on reaction rate.
7Students compare the dissolving time of a salt crystal in water at 20 degrees C, 40 degrees C, and 60 degrees C. Which condition is most important to keep constant?
A.The identity and mass of the salt sample
B.The temperature of the water
C.The measured dissolving time
D.The conclusion written after the experiment
Explanation: To isolate the effect of water temperature, the salt identity and mass must be held constant. Otherwise, differences in dissolving time could result from sample size or composition rather than temperature.
8A student measures the density of a metal as 2.42 g/mL. The accepted value is 2.50 g/mL. What is the student's percent error?
A.0.08%
B.3.2%
C.8.0%
D.32%
Explanation: Percent error equals absolute error divided by accepted value, multiplied by 100. The calculation is |2.42 - 2.50| / 2.50 x 100 = 3.2%.
9A catalyst is added to a reaction mixture, and the products form more quickly. Which follow-up measurement best tests whether the catalyst changed the reaction pathway rather than the final amount of product possible?
A.Measure the activation energy or rate constant with and without the catalyst.
B.Record the color of the catalyst before it is added.
C.Compare the molar masses of the reactants only.
D.Determine the boiling point of the solvent after the reaction ends.
Explanation: Catalysts increase rate by providing a lower-energy pathway, so rate constants or activation energy are directly relevant. The equilibrium amount of product is not changed by a catalyst.
10A balance consistently reads 0.12 g too high when checked with certified calibration masses. What type of error is primarily indicated?
A.Random error from unpredictable scatter
B.Systematic error from instrument bias
C.Human error from recording too many significant figures
D.Sampling error from using too few trials
Explanation: A consistent offset in the same direction is systematic error. Calibration or correction is needed because repeated measurements will not remove the bias.

About the AEPA Chemistry NT306 Exam

AEPA Chemistry (NT306) is the Arizona subject knowledge assessment for chemistry teacher certification, delivered as a National Evaluation Series test. The official profile organizes the 150-question exam into five weighted domains: Nature of Science; Matter and Atomic Structure; Energy and Chemical Bonding; Chemical Reactions; and Stoichiometry and Solutions.

Assessment

150 multiple-choice questions across five official content domains

Time Limit

3 hours 45 minutes testing time; 4 hours total CBT appointment

Passing Score

220 scaled score

Exam Fee

$119 (Arizona Department of Education / Pearson (AEPA and NES))

AEPA Chemistry NT306 Exam Content Outline

18%

Nature of Science

Scientific inquiry, experimental design, collection and graphing of data, evidential claims, lab safety, chemical hazards, measurement standards, uncertainty, mathematical problem solving, major scientific ideas, models, unifying themes, and science-technology-society relationships.

18%

Matter and Atomic Structure

Elements, compounds, mixtures, chemical and physical properties, unknown-substance identification, physical, chemical, and nuclear changes, radioactivity, atomic models, subatomic particles, energy levels, photons, spectra, electron configurations, Lewis symbols, periodic trends, kinetic molecular theory, states of matter, phase diagrams, and gas laws.

23%

Energy and Chemical Bonding

Thermodynamics, calorimetry, spontaneity, heat and temperature, bond enthalpy, reaction-energy diagrams, energy in phase transitions and dissolving, IUPAC nomenclature, ionic, network, metallic, inorganic, and organic structures, molecular geometry, isomerism, chemical bonding, intermolecular forces, and structure-property relationships.

23%

Chemical Reactions

Reaction types, predicting products, collision theory, reaction-rate factors, rate problems, chemical equilibrium, Le Chatelier's principle, equilibrium constants, acid-base definitions and calculations, buffers, titrations, oxidation numbers, redox balancing, electrochemical cells, electrolytic cells, and applications of electrochemistry.

18%

Stoichiometry and Solutions

Mole concept, molar mass, percent composition, empirical and molecular formulas, chemical notation, balancing equations, net ionic equations, stoichiometric calculations involving mass, moles, volume, energy, limiting reactants, percent yield, solution types, colloids, suspensions, concentrations, solubility, solubility curves, and colligative properties.

How to Pass the AEPA Chemistry NT306 Exam

What You Need to Know

  • Passing score: 220 scaled score
  • Assessment: 150 multiple-choice questions across five official content domains
  • Time limit: 3 hours 45 minutes testing time; 4 hours total CBT appointment
  • Exam fee: $119

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

AEPA Chemistry NT306 Study Tips from Top Performers

1Study by the official weights: prioritize Energy and Chemical Bonding and Chemical Reactions first because they are 46% of the profile combined.
2Practice interpreting data, uncertainty, lab safety scenarios, and scientific claims; Nature of Science is broader than recall of chemistry facts.
3Memorize high-yield periodic trends, electron configurations, VSEPR shapes, intermolecular forces, and common polyatomic ions before heavy calculation practice.
4For reaction questions, separate the skill being tested: product prediction, rate law, equilibrium shift, pH calculation, redox balancing, or electrochemical reasoning.
5For stoichiometry and solutions, write units at every step and use balanced-equation mole ratios before converting to mass, volume, concentration, or percent yield.
6Use the on-screen reference-material policy in your practice routine: know what values are provided, but memorize relationships such as q = mc delta T, PV = nRT, pH = -log[H+], and delta G = delta H - T delta S.

Frequently Asked Questions

What is the current AEPA test code for Chemistry?

The official AEPA tests list currently identifies Chemistry as NT306. The NES profile page labels the test field as Chemistry (306), and this metadata uses the current AEPA code NT306.

How many questions are on AEPA Chemistry NT306?

The official AEPA Chemistry test page lists 150 multiple-choice questions. The official profile describes the format as multiple-choice questions across five content domains.

How long is the AEPA Chemistry exam?

For computer-based testing, the appointment is 4 hours total, including 15 minutes for the tutorial and nondisclosure agreement and 3 hours and 45 minutes of testing time. The online-proctored appointment is listed as 4 hours and 15 minutes total with a break between domain groups.

What score do I need to pass AEPA Chemistry?

The official AEPA Chemistry test page lists a passing score of 220. AEPA/NES scores are reported on a scaled-score system.

How much does AEPA Chemistry NT306 cost?

The official AEPA Chemistry test page lists the test fee as $119. Candidates should confirm the final checkout total during registration in case payment policies or optional materials change.

What reference materials are provided for AEPA Chemistry?

The official test page and profile state that reference materials are provided on-screen, including a scientific calculator, formulas and constants pages, and a periodic table.