D866 General Chemistry II with Lab continues the general chemistry sequence in WGU's secondary chemistry route.
WGU describes it as continuing the study of general chemistry for students seeking initial teacher licensure, covering energy transfer in physical and chemical processes, naming and recognizing compounds, stoichiometry, solution concentration and reaction prediction.
The course also asks you to design experiments, collect and analyze data and communicate findings. Students typically find the combination hard: accurate calculations, correct chemical language and a lab report that explains results, not just reports them.
Course at a Glance
| Item | Details |
|---|---|
| University | Western Governors University (WGU) |
| Course code | D866 |
| Level | Undergraduate, chemistry content |
| Subject area | General chemistry, with lab |
| Prerequisites | Check your degree plan (the course builds on General Chemistry I) |
| Assessment | Set by WGU on your course page; check it before you plan |
What D866 Covers
| Theme | What it means in practice |
|---|---|
| Energy transfer | Heat changes during physical and chemical processes |
| Compound naming | Naming and recognizing compounds correctly |
| Stoichiometry | Amounts of reactants and products from balanced equations |
| Solution concentration | Molarity and dilution |
| Reaction prediction | Anticipating products and outcomes |
| Lab and communication | Designing experiments, analyzing data, reporting findings |
Key Concepts Explained
Stoichiometry
Convert grams to moles, use the mole ratio from the balanced equation, then convert back. Skipping the balanced equation is the most common cause of wrong answers.
Example: 2 H2 + O2 gives 2 H2O. How much water forms from 4.0 g of H2? Moles H2 = 4.0 / 2.0 = 2.0 mol. Ratio 2:2 gives 2.0 mol H2O. Mass = 2.0 x 18.0 = 36 g.
Molarity and Dilution
Molarity is moles of solute per liter of solution. When you dilute, the moles of solute stay the same, so M1 V1 = M2 V2.
Example: How much 6.0 M stock is needed to make 250 mL of 0.50 M solution? V1 = (0.50 x 250) / 6.0 = 20.8 mL. Add water to bring the final volume to 250 mL.
Energy in Reactions
Exothermic processes release heat to the surroundings; endothermic ones absorb it. In a calorimeter, heat gained by the water equals heat lost by the reaction, which lets you estimate the energy change.
Typical Assignments and How to Approach Them
WGU's guidebook does not list task prompts. The table describes kinds of work this content points to. Follow your own instructions.
| Work type | What it tests | How to approach it |
|---|---|---|
| Quantitative problems | Stoichiometry, solutions, energy | Balance, convert, calculate, state units |
| Nomenclature tasks | Language of chemistry | Apply the naming rules and show the pattern |
| Lab report | Experimental design and analysis | Method, data, calculations, conclusion |
| Applied scenario | Environmental or industrial context | Link calculations to the real situation |
A Study Approach That Works
- Refresh the basics. Moles, balancing and unit conversion underlie everything.
- Practice one skill per session. Stoichiometry, then solutions, then energy.
- Write lab sections as you work. Record observations and units immediately.
- Add context. Finish each calculation with what it means in a real setting.
Where Students Get Stuck
- Quantitative answers with no context. The course emphasizes applying chemistry to environmental or industrial problems.
- Unbalanced equations. Balance first, every time.
- Volume confusion. Convert mL to L before computing molarity.
- Significant figures. Follow your instructions for rounding.
Planning Table
| Stage | Goal | Evidence to keep |
|---|---|---|
| Read the task | List requirements | Rubric checklist |
| Set up | Balance and convert | Equation and mole map |
| Calculate | Show each step | Worked solution |
| Interpret | State the real meaning | One sentence |
| Report | Present clearly | Tables and text |
Self-Check Questions
Check your skills with these questions before you finish a lab or problem set.
- Is the equation balanced before I start the calculation?
- Have I converted mL to L and grams to moles where needed?
- Is the sign of the energy change consistent with an exothermic or endothermic process?
- Do my names for compounds follow the rules for ionic and molecular compounds?
- Does the final answer make physical sense in the real context?
Study Tips for D866
- Write the balanced equation before anything else.
- Carry units through every line.
- Keep a naming-rules cheat sheet with examples.
- Sense-check answers: could 500 g of product come from 2 g of reactant?
- Read the lab safety notes in your materials before starting any procedure.
How We Help with D866
Send the task instructions, the rubric, your lab data and any feedback. A tutor can walk through stoichiometry and solutions with new numbers, check your working, edit your lab report for clarity, or prepare a custom solution for you to study. Our lab report guide covers structure.
GradeEssays is independent of Western Governors University. Our work is a study and reference aid: use it to understand the method, then complete and submit your own work under WGU's academic integrity policy.
We do not invent or fabricate data. Orders are written from scratch, include free revisions within the scope of your original request, and are refunded in full if late. We cannot promise that any assessment will be passed.
Get D866 Chemistry Working
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Frequently Asked Questions
WGU describes energy transfer, compound naming, stoichiometry, solution concentration, reaction prediction, experimental design, data analysis and communication of findings.
The course builds on General Chemistry I. WGU's own descriptions differ in how they present prerequisites, so confirm in your degree plan.
It depends on your course resources. Check your course page.
Balance the equation, convert to moles, use the ratio, then convert back, writing units each step.
No. We help you understand the method and write up your own results. We do not fabricate data.
On your D866 course page and with your instructor. WGU sets the assessment.