100+ Free WEST/NES Chemistry 306 Practice Questions
Pass your Washington National Evaluation Series Chemistry (306) exam on the first try — instant access, no signup required.
Adding a nonvolatile solute to water generally has which effect on the solution?
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Key Facts: WEST/NES Chemistry 306 Exam
306
Current Chemistry Code
WEST tests list
150
Multiple-Choice Questions
Washington NES Chemistry (306) test page
3h 45m
Testing Time
Washington NES Chemistry (306) test page
220
Passing Score
Washington NES Chemistry (306) test page
$119
Test Fee
Washington NES Chemistry (306) test page
18 / 18 / 23 / 23 / 18
Official Domain Weights
Washington NES Chemistry (306) profile
The current WEST tests list identifies Chemistry as NES code 306, while code 051 is English Language Learners. The official Washington Chemistry test page lists a 150-question multiple-choice assessment, a posted fee of $119, a passing score of 220, online proctoring availability, 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 WEST/NES Chemistry 306 Practice Questions
Try these sample questions to test your WEST/NES Chemistry 306 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A student investigates whether increasing the surface area of calcium carbonate changes its reaction rate with hydrochloric acid. Which factor should be intentionally varied?
2Which practice is safest when diluting concentrated nitric acid for a laboratory activity?
3A balance displays the mass of a sample as 12.340 g. How many significant figures are reported?
4Which statement is an observation rather than an inference?
5Which tool is most appropriate for preparing exactly 250.00 mL of a standard solution?
6A news article claims that a household product is safe because it is chemical-free. Which response best reflects scientific reasoning?
7A student titrates the same vinegar sample three times and obtains 4.92%, 4.95%, and 4.94% acetic acid. The accepted value is 5.30%. Which conclusion is best supported?
8In an experiment measuring reaction rate, the concentration of reactant decreases from 0.80 M to 0.50 M in 60 s. What is the average disappearance rate of the reactant?
9A calibration curve for absorbance versus concentration has the equation A = 0.250C + 0.010, where C is in mol/L. An unknown has an absorbance of 0.135. What is its concentration?
10A thermometer consistently reads 1.8 degrees C higher than the true temperature. Which type of error does this introduce?
About the WEST/NES Chemistry 306 Exam
Washington NES Chemistry (306) is the current chemistry content knowledge assessment listed by WEST for candidates seeking a chemistry endorsement to a Washington teaching certificate. The official profile organizes the 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 (Washington Educator Skills Tests (WEST) / Pearson NES)
WEST/NES Chemistry 306 Exam Content Outline
Nature of Science
Scientific inquiry, experimental design, data collection and graphing, evidential claims, laboratory safety, chemical hazards, measurement standards, uncertainty, mathematical problem solving, major scientific ideas, models, unifying themes, and science-technology-society relationships.
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.
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.
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.
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 WEST/NES Chemistry 306 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
WEST/NES Chemistry 306 Study Tips from Top Performers
Frequently Asked Questions
What is the current WEST code for Chemistry?
The current WEST tests list places Chemistry under National Evaluation Series tests with code 306. Code 051 on the current WEST tests list is English Language Learners, so this metadata uses the current Chemistry code 306.
How many questions are on Washington NES Chemistry 306?
The official Washington 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 Washington NES 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 Washington NES Chemistry 306?
The official Washington Chemistry test page lists a passing score of 220. Scores are reported on the NES scaled-score system.
How much does Washington NES Chemistry 306 cost?
The official Washington 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 Washington NES 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.
Does the official Chemistry 306 profile include a separate science instruction domain?
No. The current official profile lists five content domains: Nature of Science; Matter and Atomic Structure; Energy and Chemical Bonding; Chemical Reactions; and Stoichiometry and Solutions. Inquiry, data use, safety, and science-society reasoning appear within Nature of Science rather than as a separate instruction domain.